I would say it happens at least 25% of the time for me. They just ghost you. And don’t respond to messages. Once I was selling a camera and I was really frustrated because there were two people in a war and the one who won didn’t pay. They finally did write saying they couldn’t afford it. So why bid it up?? And then when I offered it to the second person they didn’t want it anymore. So I relisted it. eBay is not helpful because you’re not allowed to leave negative feedback and I think that’s one reason why there are so many non-paying bidders. It doesn’t really affect them negatively. also if somebody has zero feedback you cannot do anything about it - in other words you can’t just limit to people with feedback. Many times zero feedback people don’t pay. The only thing you can do is report it and if a buyer has lots of reports eBay might prevent them from buying. I also am able to block people who have a report from bidding. If everyone on eBay did this, then it might make a difference.
Well that sux the kumera big time

We have trade me here in NZ
ive never ever got a great deal but every body pays or you get negative ratings and probably banned if someone has a history of doing it
I once had a lady get really sh*tty with me when i had the flu real bad and was late paying
she got ultra nasty and threatened to report me going on how the package was taking up room in her hall* so in a fevered dilerouse state i paid her
when the item arrived (a vintage marble jewlery box) it was missing its G*d dam blo*dy hinge which she never mentioned in her listing the cow
* it was the size of a 1kg block of cheese - you would have thought it was a tea chest the fuss she was making
everyone else ive ever delt with were pretty reasonable