Start with recalls and safety
Search CPSC recall information for the exact product. The agency says its rules apply to resellers, including thrift stores and yard sales. Do not resell recalled goods. Nursery products, damaged electrical equipment and items missing safety parts deserve special caution; a low price does not reduce the hazard.
Avoid uncertain authenticity
Counterfeit goods can create legal and consumer harm. Do not describe an item as genuine because a label looks familiar or a seller said so. If you lack a reliable basis for authenticity and lawful ownership, pass. A disclaimer does not automatically permit a prohibited sale.
Check category restrictions
Marketplaces and laws may restrict medical products, weapons, hazardous materials, tickets, digital accounts and other goods. Food, cosmetics and safety equipment can introduce expiry, hygiene or certification issues. Read current official requirements rather than relying on another listing as proof the category is allowed.
Use a stop list
Write down categories you will not buy because you cannot inspect, authenticate, insure or ship them safely. Revisit the list only after gaining reliable knowledge, not because a deal feels urgent. The sourcing checklist is a prompt; checked boxes do not establish legal saleability.
What if another seller is offering the same restricted item?
Another listing does not prove compliance. It may be incorrect, undetected or governed by different facts. Check the actual law, official safety information and marketplace rules for your item and location. Do not copy a risky listing as evidence that resale is permitted.