the seller is just listing parts. with 6spd I suspect it is about an '87ish. can you get some pics? I know it has DA but it is 20+ yo and without pics there is no way to know the condition. you may have to start replacing overly worn drive train parts. IMHO $550 might be a bit too much esp sight unseen. take a chaing gauge with you!!
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk