WTK: Is this a good deal?

I found a double digit 42 date mauser banner police with sear safety in a firm 95%. It is stamped with an eagle over L and it comes with a mag that is not numbered but is marked eagle over L.In Jane Still's book, it says that there are only 300 known to be produced and only 5 known "confirmed" I believe is the word he used. Is 1600 a good price to pay for it? I had a source from the boards tell me it was worth around 1300. Thanks for all the help.