My dad has pretty much the exact same bike...even the size looks the same. I thought his was an 86', but it could be an 87'. I wouldn't worry about the rim until it's time to replace one...it can be easy or hard to find an original replacement depending on where you are and what you want to spend. It's certainly not impossible.

Value...maybe $175 on a good day in a good market...probably more 150ish with a well written ad in a solid market.