Probably something many have been screwed over and bummed out by, but I swear a few of my most recent eBay experiences have been hell on my faith in humanity.
Two out of my last 3 experiences as a seller, and one of my last 5 experiences as a buyer on eBay have been poor at best.
The buyer part is probably just from an honest mistake by a stressed out business that just couldn't catch up with all of the transactions they had going on. It actually worked out ok as the seller refunded my money for the item I had done a buy it now for (a long video cable for use at work, one of those great dirt cheap buy it now items with about 3 times the actual shipping cost added in as shipping and handling). I actually wound up getting myself on the hook to buy from the same seller again (by accident as I was still looking for the same part and did a buy it now again before confirming that I wasn't buying from the same seller) and the second time around worked fine.
The seller part is the part that is truly bumming me out. I go through spurts of selling on eBay, mostly because I don't want to part with stuff, and also because I don't like the hassles of listing items, and really don't like dealing with the hassles of non-paying bidders and such that have become more prevalent at eBay.
... more in comments area (saving some space in the listing area here)