4. Check the product you’re buying or selling has instructions for use and warning labels still attached.
If they’re not present, sometimes you can request these be sent to you from the manufacturer of the item. However, please do this before selling the product (this burden should not be placed on the purchaser).
5. Ensure the product you’re buying or selling is clean (sanitary), and that it was washed/cleaned according to manufacturer instructions.
Some safety products, such as car seats, have very specific instructions for cleaning. Failure to follow these instructions can compromise the ability for it to perform correctly in the event of a crash.