OP: when you ask for "opinions" .... Opinions on whether it is probably safe to ride? Opinions on whether it is wrong to try to sell it? Opinions on whether we should buy it? Opinions on whether opinions taste better than licorice? Unclear at this time ......

Nothing wrong with selling stuff for parts. I wouldn't buy it... because I have no use for single-speed ... but if I were attending college it would be a super bike for around campus.