I have an all original marlin model 18 in solid condition. It's turned mostly patina. The problem is that there is almost no rifling left and it just doesn't group anymore. I could buy another barrel from numrich or my local smith said he could reline it for $150. I was going to give it to my son, but now I'm wondering if I should just sell it as a collectors piece and pick up a 39 instead. Any thoughts or suggestions are welcomed.