I've sold several nice Varsinentals for under $100. Every one was found in the trash and given the complete once over... De-rusting, polishing, re-greasing, full tune up. If the bearings on one of these 30 plus year old bikes have never been re-greased, they'll need it before you commence regular service.
I always list my bikes below market and FIRM, because I know they are %100 ready to roll and look much better than the competition. Usually the first person to show up buys them and is more than thriled. It's a fun hobby. This one went for $60 and the kid who bought it kept asking me what was wrong with it!