Ebay is where I bought my Avalon 60gh and I see this all the time even now. I am surprised at this also. I was nervous when I bought my Avalon from somebody that had 14 feedback with 100%. Preorders too, I have seen some "ready to ship" or "low wait list number" selling on eBay. I am guessing that the company has a "ship to" address and the seller puts the buyers PayPal address in that section, which is weird since I think they could possibly not even put in your address and by the time they ship out it would be too late to put in a claim with eBay or maybe they have an account and give you the account info and password then the winner can change everything on the account. I don't know though it just seems sketchy. I only buy "In hand" miners off of it though.
Yeah by the time it takes to recieve the order it would already be to late to dispute it. There are alot of people with 0 feedback selling mining stuff and people bidding like crazy It is unbelievable.