A few, even though I'm usually on the lower end of things.
A bike from a brand I really like, not the exact style I like but one of the builders personal bikes. Went for far too little and much less than I expected.
Only to be parted out on ebay about a week later.
Same auction, used their online bidding system for a few items. Look at the finished prices and it looks like I got them all and at bargain prices. Waited a few days and asked for an invoice since I hadn't heard.
"Oh, there was an internet outage for about 100 lots, you didn't win any of them"
It was years ago and I still haven't even tried beyond looking at their listings. Won't go to their related swap meet either.