Mauser Model 72E Trap 12ga.??

[dw]

I need any info on this gun. A local guy has one for sale but i need to know the value of this gun before i start to deal with him. I is exactly as the description says a Mauser Model 72E Trap 12ga. with a single trigger. I know these were made for only a short time. the gun is in excellent cond. But he has no manuel so i don't know how old it is. Thanks dw