A guy I work with is trying to sell a well used wingmaster for $300. I've offered $200 and he's considering it. My only problem is this gun is only chambered for 2 3/4" shells. I assume it is pretty old? It appears to be in pretty decent condition, but does have some wear on the blueing. Plans for this would include a shorter barrel, extended magazine tube, and synthetic furniture. Would this be worth picking up?