Hold on Ol'Navy... I had a port installed too and had to stop shooting for about 1-2 years... then I had the port removed when all the chemo and other tests were pretty much over... after a short heal I can shoot rifle again. I've spent 8 or more solid hours shooting 308 at the range (of course after loosing 60 lbs i now use a decelerator pad).
Also.. don't you still live in a free state where you can sell your rifles in a private sale? I'd guess you have the background to spot a shady deal when you see one. Guns don't eat anything, so if it takes a little time to get your price, just be patient, the right guy will come along... and you may be giving away a few hundred dollars or lots of fun by trading them to a dealer. My advice is to find a nice gun to buy from an individual privately and to either keep or sell your rifles yourself. Also get that port removed as soon as you don't need it anymore...
good luck.