My question would be whether or not a “premium” price was paid by the OP? That, of course would be from the perspective of the OP. I’m guessing in view of the “red flags” of; buying at night, deflated tires/unable to test ride and the perception of a “bike shortage” coupled with missing potential purchases in the recent past, the OP most likely DID pay a premium price! Buyer’s remorse occurred with the dawn of the next day. Craig’s List, FB MarketPlace and other “private party” sales should always be a “let the buyer beware” situation.