As a matter of fact, I've been a powerseller on ebay for over 5 years. (My user name is eldragon.)
While I probably woudn't purchase a car or house on ebay, I might sell one - but that's doubtful, too.
The venue (ebay) has changed dramatically in the past few years. It's actually sad. Big business has taken over, just like in every other place.
The good times seem to be almost over and I can barely meet my power seller status quotas every month.