The good thing, is that there are few dishonest crooks on eBay. Of thousands of transactions, I've only had a few problem buyers or sellers.
One time I purchased a computer over $1000. After not receiving it for several weeks (way past the promised delivery), I complained to the seller. No response, after several inquiries. I escalated to eBay and got the seller's telephone number and called him. Put him on the spot and demanded to know when I would receive the computer. He then admitted he sold it to someone else (after receiving my money). He then failed to refund my money, I escalated further to eBay that it was criminal fraud and eBay's 'quality assurance team' or whatever, refunded my money. I'm willing to let a dollar or two slip by, but not $1000. Most sellers are honest people, and I'll stand by that statement.
Wow. That means negative feedback, right ;)
I’ve heard almost every trick by scam buyers. One of my buds takes pictures of anything item past $100 just in case they sell to some crook, and they say something like “it’s damaged and seal broken” when he 100% damn knows it was brand new and sealed.