This is a transferable gun on form 4 or a dealer sample?
I don't know about the price of a M37 but I saw the transferable 1919s at Knob Creek priced around $14,000 to $18,000
edit: I found an old add for a transferable M-37 that sold for $18,000 last year. This was a rebuilt gun I think...
Stopping power: The power some guns have to make you stop what you are doing and get your wallet out.