Definitely pawn shop (jewelry in display case, I think). In any case, neither a guitar/music shop or a pawn shop would be guaranteed to value it correctly, especially since it seems to be partly stumping the collective wisdom here. And a pawn shop could very very much undervalue it - though you know they tend to make pricing mistakes in the other direction.Also the pictures include a display case with equipment, and walls with guitar hangers.
So this is an instrument shop or a pawn shop. Certainly this seller would know if it were worth more than $500