I used to sell a lot on ebay. They now have strange customer service rules that encourage fraud among customers so inclined. They have gotten bold and creative with frauds--ordering high ticket items, then complaining about being sent a piece of paper onstead of the item, entitling them to a refund. Try getting your chargeback money! Ebay and cc companies now require police reports, etc. Lots of hassle. I havent sold there in years for this reason.
If you decide to sell anywhere online and ship to customers, be sure to record a movie of yourself putting the item in the box, sealing it, and get an image of the final boxed item ready to go. Be sure to take it to the post office or ups/fedex and wait while they scan it into their system. Keep receipts and track the item. Do what you can to protect yourself.