Originally Posted by
noglider
It's definitely either a Mirage or a Super Mirage. As I said, 90% chance it's a Mirage. If it has aluminum rims, then good. Ask him to put a magnet to the rims. I can see the rest from here and can confirm that it's a Mirage frame.
Cottered steel cranks, stem shifters, turkey levers, claw derailleur hanger = steel rims (unless a prior owner replaced them).
Dirty bike, I would assume it has mechanical issues. Probably nothing serious, but will need a full service: bearings, grease, cables, housings, etc.
Tires recently replaced, and they don't even match??
Price is OK for San Fran, any regular market, no way.
Appeal of a french bike from that era? It will have the typical French bike issues: French bottom bracket, French headset, oddball french thread pedals. While I have owned several french bikes from that era, I really prefer the mid 80s or newer when they migrated to standard sizing.