It could be proof. It's hard to tell from pictures, but if it is, it is a VERY low grade proof. Maybe an PR-AU, or even a PR, EX. There seems to be quite some rub on his cheek, and a lot of marks in the field. If that is the case, I would expect a value of $8 to $15. Silver melt is about $6.45.
In my experience there is not much of a market for a low grade proof. There are enough nice ones out there to satisfy demand.