Earlier today I put a pair of NHT Absolute Zeroes on my watch list on eBay. They were only $85 at the time and ending in a few hours. I expected to get a reminder from eBay so I could go and place a bid, but I never got one. They sold (the pair!) for $105.
I know I was stupid for not setting a reminder myself, but I'm still really annoyed. $105!!