Polk, I agree. Some sellers do have a clause "If you have negative feedback or less than #'s, please contact me before bidding or your bid will be cancelled." With possible dishonest sellers or buyers no system will be perfect.
I bought a "new" CD years ago. When it never arrived, I emailed the seller. They said my payment was never received. I answered that I would do a money order search which costs $. In the meantime I received the CD, (used). I was ok with that. Later on I noticed the seller gave me negative feedback,"never sent payment". My solution: I boycotted Ebay for years. Then a friend informed me of new policy and looked up my feedback. Ebay had erased that 1 negative out of 300 positive. Recently, I bought an antique from England, I'm in USA. It came as a repro. Seller agreed to a return. After sending back, I never heard from seller for a couple weeks, then they said they were in hospital, etc. I contacted Ebay, and was told they could do nothing. I had them look up my past history. I asked what $ items do I buy and sell? Do you want me to leave Ebay again? They then "VERY" quickly fixed my problem. Also, I will no longer buy or sell from outside USA.