[Formerly YB-2]

Any of the auction houses can point you in the right direction for an appraiser. Your biggest problem will likely be getting past the person who answers the phone to someone who can actually give you the info. You might start by telling the phone-answerer that you have a print to sell so they will forward you to someone in the business. You might also as Rago in Lambertville. We've always found them good to deal with, though its been a few years and they've expanded considerably since our last interaction.