I feel like eBay froze my payment the first time I sold something at the ~$10k level. This was in the olden days before the AG service, so I'm pretty sure they held my funds until the buyer got the piece. It was a little aggravating at the time, but I got my cash in the end.
While I can definitely see your point about corporate greed, I think there's also an element where they have to comply with know your customer rules and all that jazz, just to make sure they're not funding terrorists or money launderers.
Not that you should be under suspicion, but that's the price of living in an otherwise free society - sometimes there are extra checks when the stakes are high.
I guess you could always sell another high priced item and see if they jerk your chain again?
