If something is misrepresented, the original deal is null and void IMO. I once drove to Detroit from north of Boston for a turbo Legacy. Left after work Friday and met the guy on Saturday morning. He knew I was coming from 800 miles away or so and must have thought he had me by the shorts as his "body in great condition for its age" was nonsense—his '93 had far, far had more rust than my '90 with signs that it had been rallied and not taken care of (rot in places that would only get rotted from sitting mud that would only accumulate there from high speeds). Needed a clutch, full suspension, and had a bunch of other small issues (none of which were mentioned in spite of me asking on the phone prior), as well as just seeming EoL. He tried to deny the issues to my face until I told him that I have extensive experience with rot and could put my fist through the "minor bubbled paint" on the fenders and quarter panels if he wanted to test his honesty. Told him I'd take it for less than a quarter his asking, yank the engine (valuable, fairly rare closed deck block which is what I mostly wanted it for, anyway) to throw it in the back of my car, and junk the shell locally. He didn't go for it, as I figured he wouldn't and I was back home later that day.
A year or so later, someone else came on the old Subaru board to try to sell the same car and I told everyone about the POS. Turned out the seller wasn't him, but the inexperienced mark he ended up getting to buy it and she was just trying to recoup some money. I felt bad, but she understood and we spent some time cursing the bastard. She learned her lesson the same expensive way I did (though at least my 240Z was cheaper).