Good morning dllt: Well in general from what you said a 1940 (s/n 845981) I would say no. What would bring it up to that value:
1) If it was a Solid Ribbed gun, with Skeet grade stocks or a "Deluxe field" grade in about 98% condition or better.
2) If it had a 32 in barrel, (only 24 were made)
3) If it was a Pigeon gun, or Trap gun and so marked.
4)If it is "Brand New in the Box" (NIB) never fired with all the original paper work and the bill of sale.
5) Some unique feature, that prooves it is a "Special Order" gun
6) If the gun history is known and some celebrity has owned it in the past, and there is proof of this.
I could go on, but you see where I'm going here.
In reality a much more detailed description of the gun and it's condition would be required to establish a somewhat realistic value. But there are some rare Md 12's out there that are worth a lot more than $2000.