This guide opens with how secondhand commerce has exploded and the varied platforms that now serve it; then walks through the major marketplaces and their distinct cultures; reviews evaluating sellers and items as a buyer; covers pricing items realistically as a seller; addresses safe transaction practices for both sides; examines specific categories — electronics, vehicles, furniture, collectibles — that have specific considerations; covers shipping vs. local meetups; and closes with practical directions for marketplace activity that doesn't go wrong. The tone is direct and informational.
1. The marketplace landscape
Secondhand commerce occurs through:
- eBay: auction and fixed-price; global reach; oldest major platform
- Facebook Marketplace: local-focused; integrated with Facebook accounts
- Craigslist: long-standing; local; minimal moderation
- Mercari, Poshmark: specific to certain categories
- OfferUp: mobile-first local
- Specialty platforms (Grailed, StockX, The RealReal for specific categories)
- Reddit hardware swap, etc. for niche communities
- Estate sales and auction houses (online versions)
- Pawnshops (in-person)
Each platform has distinct user culture and norms. eBay buyers expect detailed descriptions and shipping; Facebook Marketplace buyers expect local pickup; Craigslist users expect cash-and-carry.
Buyers and sellers benefit from matching expectations to platform. Cross-platform listings sometimes work but require attention to platform-specific norms.
2. Major marketplace cultures
eBay:
- Listings with detailed descriptions and many photos perform best
- Bidding culture for auctions; "Buy It Now" for fixed pricing
- Seller and buyer ratings matter substantially
- Payment through PayPal historically; eBay payments now
- Shipping integrated; sellers handle
- Returns policy varies by seller
- Disputes processed through eBay
- Reasonable buyer protection
Facebook Marketplace:
- Local focus
- Profile photos visible; less anonymous
- Listings often briefer
- Cash transactions common
- Pickup at meeting points or homes
- Less platform protection
- Best for furniture, vehicles, larger items
Craigslist:
- Very local
- Anonymous email through platform
- Cash transactions
- Less moderation
- More potential for scams
- Best for furniture, vehicles, free items
- "Free" section excellent for moving
Mercari/Poshmark:
- Clothing-focused mostly
- Negotiation culture
- Shipping handled
- Returns policy varies
- Lower threshold for issues than eBay
Specialty platforms:
- Authentication services for high-value items
- Higher fees but better protection
- Best for designer goods, sneakers, watches, collectibles
- Slower transactions for vetting
Estate sales:
- Whole households being sold
- Excellent for furniture, kitchenware, books
- Negotiation toward end of sale common
- Cash often required
The right platform depends on what you're selling/buying and how much process you want.
3. Evaluating as buyer
Item evaluation:
- Read descriptions carefully
- Multiple photos help
- Ask for additional photos if descriptions vague
- Verify condition stated matches photos
- Specific defects mentioned vs. "as is" claims
- Brand authenticity for designer items
Seller evaluation:
- Profile age and activity
- Ratings and reviews (on platforms that have them)
- Specific reviews not just star averages
- Response time and quality
- Number of items they've sold (or are selling)
- Their other listings
Questions to ask before buying:
- Specific defects?
- Original packaging?
- Authentication documentation (for designer items)?
- Working condition (for electronics)?
- Year of manufacture (for vehicles, electronics)?
- Why selling?
- Have you owned it?
Pricing comparison:
- Recent sold prices (eBay "sold listings" filter helpful)
- Other current listings for comparison
- Retail price for context but not basis
- Negotiation expectations vary by platform
Red flags:
- Pressure to act quickly
- Unwillingness to provide additional photos
- Prices much below market for known authentic items
- Unwillingness to verify items
- Shipping requests for cash-only items
- Stories that don't add up
4. Pricing as seller
Realistic pricing matters:
- Research recent sold prices for similar items
- Account for condition (fair, good, excellent)
- Account for accessories, original packaging
- Account for desirability (popular models vs. obscure)
- Account for time to sell vs. price
Strategies:
Auctions:
- Start low to encourage bidding
- Or start at minimum acceptable price
- 7-day duration common
- End on weekend evening when more bidders active
Fixed price:
- Slightly higher than ideal to allow negotiation
- "Or best offer" allows flexibility
- Reduces over time if not selling
- Reasonable prices sell faster
Pricing too high:
- Sits without bites
- Reduces over time
- Wastes listing fees on some platforms
- Eventually sells low after frustration
Pricing too low:
- Sells quickly but leaves money
- Sometimes intentional for fast clearing
- Note: very low pricing on valuable items sometimes attracts scammers
Negotiation:
- Most buyers expect some
- Bottom price set before negotiating
- Don't let lowball offers offend; counter or decline
- Multiple-item buyers often expect modest discount
- Local pickup buyers sometimes negotiate
For large items (furniture):
- Local pricing differs from shipped pricing
- Pickup expectation factor
For shipping items:
- Account for shipping cost in pricing strategy
- Free shipping increases buyer interest but reduces seller margin
- Calculated shipping with weight matters
5. Safe transactions
For local meetups:
- Public places (police station parking lots, busy retail areas)
- Daylight hours when possible
- Bring someone with you
- Tell others where you're going
- Don't invite strangers home for low-value items
- For higher-value items, video or photograph the transaction
- Cash counted before handing over goods
- Verify cash isn't counterfeit (basic checks)
For shipping transactions:
- Track shipments
- Insurance for valuable items
- Signature confirmation for high value
- Document packaging condition
- Photograph item before shipping
For payment:
- PayPal goods and services (NOT friends and family for purchases — loses protection)
- Platform-protected payment when available
- Cash for local; verify it
- Avoid wire transfers, gift cards
- Check or money order: holds for clearance
- Don't accept overpayment "by mistake" with request for refund (classic scams)
Common scams patterns:
Buyer:
- Sends fake payment notification
- Claims item not received after receiving
- Files chargeback after using item
- Claims item different from description after using
- Requests refund and keeps item
Seller:
- Sends nothing after payment
- Sends different/lesser item
- Sends working item that's actually broken
- Sends counterfeit goods as authentic
Both:
- Phishing through platform messages
- Sending fake "click here to receive payment" links
- Asking for personal information
Defense:
- Stay on platform for messages
- Use platform-protected payment
- Document everything
- Trust your skepticism
- For high-value transactions, additional verification
- Don't be rushed
6. Specific categories
Electronics:
- Verify working condition before purchase
- Check IMEI/serial number not blacklisted (for phones)
- Factory reset before selling
- Remove personal accounts
- Original accessories and packaging valuable
- Recent purchases beat older items
Furniture:
- Inspect for bed bugs, stains, damage
- Measure to ensure fit through doors
- Plan transportation before purchasing
- Smell test (smoke, pets, mold)
- Solid wood beats particle board for value
Vehicles:
- Test drive before purchasing
- Get pre-purchase inspection by mechanic
- Verify VIN and title
- Check vehicle history report
- Cash transaction with bill of sale and title transfer
- DMV procedures for title
Collectibles:
- Authentication for expensive items
- Specialty platforms have authentication services
- Documentation and provenance matter
- Beware of common counterfeits
- Specific knowledge required for many categories
Clothing:
- Try on if local; sizing varies
- Check measurements specifically rather than sizes
- Inspect for damage, stains, wear
- Designer items: authentication especially important
Tools and equipment:
- Test functionality before buying
- Original parts intact
- Manuals if available
- Compare to current retail for value
Free items:
- Often actually useful
- Limit to what fits in your space
- "Free with pickup" often available
7. Shipping vs. local
Shipping:
- Reaches wider audience
- Includes shipping cost in price calculation
- Risk of damage in transit
- Insurance for valuable items
- Adequate packaging matters
- Tracking essential
- USPS, UPS, FedEx, others vary in cost and reliability
Local pickup:
- Cash transactions usually
- Saves shipping cost
- Limited audience to your area
- Heavy/large items often local only
- Safety considerations for meetups
- Faster transactions
Hybrid approaches:
- Some sellers offer both
- Pickup discount sometimes
- Buyer pays shipping option
For sellers:
- Lighter items easier to ship
- Heavy items consider local only or shipping cost prominently displayed
- Bulky items local only
For buyers:
- Shipped items have legal protection
- Local cash sales have less protection
- Verify items before paying for local
8. Practical directions
- Match platform to item; cross-listing requires attention
- Read descriptions carefully; ask questions
- Verify seller history
- Pay through platform-protected methods when possible
- For local: public meetups, cash, bring someone
- For shipped: track everything, use insurance for value
- Research pricing before buying or selling
- Don't be rushed; pressure tactics indicate problems
- For high-value: additional verification appropriate
- Document everything (messages, photos, agreements)
- Leave honest reviews; helps community
- Build reputation as buyer and seller
- For frequent activity, become familiar with platform norms
- For occasional, use established platforms with protection
- Don't deal off-platform; loses protection
- For electronics: factory reset and remove accounts
- For furniture: inspect carefully; transport plan
- For vehicles: inspection, title, proper transfer
- For clothing: measurements not sizes
- For collectibles: authentication for expensive items
- Negotiate respectfully
- Accept that some items take time to sell
- For sellers: clear photos, accurate descriptions, prompt communication
- Report scams to platform and law enforcement when applicable
- Older buyers and sellers: scams target this demographic; extra caution
Secondhand marketplaces handle billions of dollars in commerce annually. Most transactions succeed; the small minority that don't follow recognizable patterns. Awareness, platform tools, and basic practices handle nearly everything.