need help with value of this 57

[M1AG30]

always wanted a 629 but I have the opportunity to buy this gun... but not sure what a good price is since it seems model 57 are priced all over the place .... serial number starts N774 this is the only pic I have right now... any help is appreciated.

 

[Tom_R]

What's the asking price?

Gun and presentation case should be at least $1000.