I haven’t a clue….. however, check out some of the Stock sites…. see what they charge for this type of usage.
Position your price as you see fit….. although you are not a professional….. still don’t sell yourself short.
DOF is a little to shallow, main stone / Iron bracket at bottom of frame is a bit disruptive.
Think also about you leading lines into the frame, a little too straight here.
You also have a lot of negative space around the focal points…… try the shot again, get a little lower and come at it from an angle either the right or left sides.
Color is pleasing and the focal point is sharpe, just think about the composition.