It is a 20 dollar bill with the serial number 02162004. "birthday note".There are many pricing guides available, almost all of them will be out of date by time of printing.
Number of pricing websites for coins and currency as well that track sales on auction sites, etc. GIGO, seems like a decent approach for more common items.
I believe eBay allows you to see closed auctions/items, though it's a bit harder to find than on GunBroker. GIGO here as well, poor descriptions on eBay can cause items to sell for much less than the market would indicate.
Whatcha got?
Guy on ebay is trying to get 50 bucks for the same thing with serial 02172004.
Maybe I'll list local for 40 and see what happens. 02/16 is Sunday so maybe it will catch someones eye?
Thanks for the replies and take care,