I agree $400 would be top dollar for that small piece of ground.(Assuming it is closer to 20 than 15 acres)

Here in Western Illinois, land goes for as much as $50/acre for deer hunting. That is the extreme high I have heard of, most places around here are $20-25/acre. I have not seen a lease of less than $10/acre for several years.

Good luck!

LLBUX