Selling 1972 Valiant
If you want to do a local sale, try craigslist. I'm in the process of buying a early 70's dodge dart (dodge cousin of plymouth valiant) that I saw there. It's a very nice car. People will look, but this is a depressed market for used cars, and most folks look for a bargain. I'm not doing a bargain deal, but I'm paying a fair price for a very nice car. Otherwise, look at other postings here. I don't see why anybody would try to buy/sell through ebay - but that's JMHO. I've owned 3 Valiants in my life, all 65's so far.
Here I go again misspeaking. I mean buying/selling cars through ebay. Gotta kick those tires first, so online should just be a first step in finding a possibility, followed by the old-fashioned introduction, inspection, test-drive (reminds me of other things in life). Good luck with finding a good buyer with a good offer on your 72 Valiant!