I have a Deputy in my traffic unit that loves watches. He heard that I have an Invicta Sub Aqua (MSRP $ 1,000-$850). He wants to trade me a WWII 8mm Mauser that I have seen and a 30 cal. carbine. I know the Mauser has the German markings on it and I have shot the rifle. It's nice. My question is about the carbine. I know that there are some that are not worth much and some that are. Given the fact that a ton of manufacturers made them, which ones are worth a decent amount of money to make this trade worth it. Thank you in advance for your help.