I assume that your son has no interesting in the 220? Cuz if he does, it might be a fun car to take to college and it has lots of space to haul stuff around. If you have gone through everything it is probably as reliable as anything else...

Assuming that is a "no", I would say to put it on ebay with low expectation, craigslist, and the forums in parallel. It really depends on how much you want, condition, and location.

On the other hand, does he really need a car? Can't you keep it?????
:-) It's not like you are going to get so much for it that you will be able to buy a car that the wife likes a lot... AND if you call it your primary car whatever other car you buy might be rated lower for insurance as a "second car"....