Here is an interesting old 3 speed for $40 in Athens GA (where Univ of Georgia is located)
It is one of those late sixties/very early seventies models with the large center stick shift.... that proved to be somewhat potentially dangerous in accidents and the consumer products safety council campaigned to educate the public and pressure the bike manufacturers to eliminate such shifters.
It appears that the seller believes it may be an AMF (but it clearly is appears badged as AMC Flash), but the cottered 3 piece crank may be indicative that it is probably not of AMF manufacture, and probably was made by some other maker and specifically model named for some once existing retail chain.
https://athensga.craigslist.org/bik/...432573282.html