It's a great bike, and it looks to be in beautiful condition, but it was built by the thousand in a factory somewhere.

If you want to have a project bike, it's a great starting platform. Better touring frames are hard to come by, and the Expedition has a lot of cachet. However, if you want a bike to ride, especially without all the futzing around of a vintage built, sell it and put the money towards a new bike.

Either choice is morally acceptable; there is nothing wrong with riding a bike, that's what they were made for.