I have never found one. I do have a currency price guide for large size and small size for sale. I also use heritage auction's realized prices as well as ebay completed auctions to get price estimates.
I can't think of an equal example to NumisMedia. It's a good idea that needs to be done if one doesn't yet exist. Coin World (Amos Publishing) publishes 'Paper Money' magazine and 'U.S. Paper Money Values'. If you subscribe to the digital version of Coin World (the cheapest form of subscription they offer @ $19.99/year), you will also be able to read many of their other monthly and special publications in addition to Coin World, those are: Coin Values, Paper Money, Coin Product Guide, World Coins, US Coin Values Online, Stamp Monthly, Canadian Coin Values, British Coin Values, Mexican Coin Values, EURO Coin Values and US Paper Money Values. They also have an online Digital Library and Archives that you can access. If you are looking for auction listings realized prices for notes I suggest you join Heritage Auctions. Accounts are free and you have access to all the resources of Heritage, particularly the Auction Archives where you can research and study prices, grading, and lots more -- with really great high resolution images of the coins and notes they have sold in the past or will be auctioning in current/future auctions. Using the 'Advanced Search' page on eBay allows you to search 'completed auctions' so you can see what that marketplace has been realizing prices for items listed there.
as Krispy mentioned, current auction listings are your best source for current pricing. Heritage, Lynn Knights, Teletrade, heck even Ebay... and many more.
Another great one is the currency green sheet newsletter published monthly which i highly Recommend they can be reached at: Currency Dealer Newsletter P.O. Box 7939 Torrance, Ca 90504-7939 They were talking about going on line but i dont think that,s been done yet
good call on the greysheet! i always forget about the publication reports like the greysheet. I have never seen or used one, so i never think of them when asked :headbang: