Just shows you what eBay is becoming. They take 10% of any sale now and let flakey buyers get away with not paying all the time. Out of the auctions I've had in the past six months, half have been won by people with 0 or 1 feedback. Then they just don't pay. You can't do anything about it for a week after the auction finishes and even then it takes forever. Yes you can do a second chance offer thing but then if the original buyer suddenly decided six days later that they do want it then you're the one left in the crapper because you've falsely sold two items when you only had one.
I'm smarting from this even now. I sold an item for ~£120 a week ago Sunday. After numerous attempts to contact the buyer (with 0 feedback, although this went up to 5 feedback for low value purchases over the week), I finally was allowed to put in a no payment dispute. I can't do anything about it until Monday at the earliest though. Then I'll have to relist the item. So that'll be two and a half weeks wasted.
I sold a Black MacBook on eBay at the beginning of the year. Two and a half weeks later and nothing. I listed it again and the same thing happened. I got fed up, waited several months and tried again. Same thing happened. I've just sold it again now and finally got a sale. Of course, it is now worth less than it was when I originally sold it.