Need a bit of help with a value check. I'm sorry that I do not have pictures. The gun is currently for sale at a pawnshop and taking pictures wasn't welcome:

W.H. Baker 1897 hammergun
16ga
30" damascus
Full/Full
Fishtail top lever
Very good bores, few scattered small and shallow pits on barrel exterior
Numbers match
Factory buttplate
Tight, on the face, no cracks, crisp trigger pulls, somewhat of a visible pattern, nice modest scattered engraving, action is gray.

What's an acceptable price, superb price, and what price would be paying too much? I know the lack of pictures complicates things.