The great majority of items I've bought on ebay have been fairly described and at a fair price. A small number were sub-standard, which were sent back, without problems. Ebay sides with the buyer, which is sensible, or the whole thing would collapse. There are often cases of people offering shoddy goods or silly prices - usually this is obvious, and just ignore them. Having said all that, I do feel ebay need to refine their website, it is awkward to navigate by modern standards. A more modern competitor would find it easy to make inroads.
Edited for a spelling mistake and to add: Don't get caught up in a bidding war. just decide what the item is worth to you, and stick to that as your maximum bid.
Mike