I may be the only optimist logging in here, but I find after Black Friday and Christmas is a great time to buy because there is a bunch more on the market, after people get their new toys :-)
Value, to me, is clarified if at least two people are selling similar items for competitive prices. I prefer to think I got an okay deal, than see I got a bad deal two months later when an similar item comes up for sale two months later, if you know what I mean.
Used car prices seem to be going down, too.