And you can't even leave negative feedback for people like that any longer. 
All your time getting eaten up by people so inconsiderate. The lack of negative feedback for the buyers is frustrating - how are sellers supposed to protect themselves at all and does eBay mark these users as "negative" in an internal way? eBay policies already favor the buyer (and as a buyer who has had issues with sellers, that was appreciated), but it definitely scares me off from actively selling things on their site.
According to eBay, they get a "non-paying strike" or some such nonsense. I've checked out the two who never paid and I can't find anything to indicate they stiffed me. eBay even took away my option to leave them
any feedback because I was going to call them a couple of useless rat bastards and warn other sellers of their hijinks. There is an option you can select when selling called "buyer restrictions" where bidders with three non-paying strikes in the last however-many months can't bid on your items. But to me, if they do it more than once when given every opportunity to work with the seller and they refuse (which is the only way to get a strike), they should be banned altogether.
The eBay forums are also rife with seller horror stories where they sold an item, the buyer claimed it wasn't as represented and wanted their money back. They provide eBay "proof" by showing them a pic of some ratty ass item and eBay screws the seller over, takes the money and gives it back to them. If you even do receive your item back, it certainly isn't in the condition you sent it or even the same item.
Knock on wood, it hasn't happened to me yet but I can assure you that the first time it does, I'm done selling on eBay.
