1973 BMW Bavaria. Drove great. Had a 3 speed automatic transmission (sad!) No rust. One dented fender, poorly bondoed. Seller-disclosed minor brake fluid leak. Skinny tires, 175/80R14 or thereabouts. (175R14) $1500. Dude already had an offer of $1500, asking price. I also offered asking price, and a case of beer. Guess he liked attention? I wouldn't be cow-towed into paying more than asking, so I walked. Car was amazing-- glass everywhere, real skinny pillars, lots of room and tasteful chrome. Mostly hard surfaces. No pleather.
Same car reappeared six months later in a different town, so I figure someone bought it and found some gremlins, so I let it go.
1998 Lincoln town car with 80k miles for $800. Was the guys MILs. Florida car, no rust. I saw the ad at 11pm and emailed, but didn't call the number, b/c I didn't want to be rude. I called the guy the next morning, was 2nd in line, but 1st to show up. Dude held the car for #1 and sold it on the spot when they showed up. Drat.