RE: Would you use this product if it cost a reasonable price?
Scouting? Maybe.
Use when hunting? I think not. I can't imagine any way of using thermal imaging in an actual hunting situation that wouldn't violate my idea of fair chase.
Game recovery after dark when no weapon is being caried? By all means yes! Once that animal has been hit, we owe it to them to do anything we can to avoid loss and waste.