eBay bidding
2 eBay auctions for MS Office 97 Pro. Both full versions. I watched one, bid on the other, won neither. One ends at $56.77 with 9 bids, the other at $153.77, with 7 bids. I bought the same thing from a third auction for $91. Of the first 2, the higher price is 300% of the lower price.
So, don't bid on eBay thinking it's some reflection of a "perfect market price" like some idiot academics think the stock market is.