The fair market value is $900 in the U.S though at gun shows they very occasionally appear with an asking price of $1400.
The model 40 with correct Tula arsenal scope and rails is $5400.Again very rare and asking price is $7400 though i doubt they sell for that price.
i have a model 38 and two model 40's. one has the correct tula scope and rails. the other model 40 has the rails only.
Both of my model 40's with photo's can be seen on the warrelicseu forum.Their is a good discussion from other members.