This might give you some idea of ranges for pricing
A good source would be to take that Blue Book a bit further and stroll on into your favorite brick & mortar gunshop and solicit them letting you browse quickly at their in-store copy of the Blue Book. Much of Steve Fjestad's efforts in that book regarding militaria will have mention of the most commonly faked models as well.
I don't get one every year but every couple years the store I trade at cycles them out & I get the 2 year-old hand-me down. They're a good thing to have on the shelf, even if you only buy one and will aid in assessing finish, appendices with proof-marks, etc.
Good luck!