I purchased my '72 Schwinn from a shameless flipper.
He posted it as a '69 Schwinn, so he obviously did not know Schwinn's more than the next guy. However, he was honest. He told me that he has a couple friends that he takes dumpy bicycles to, they replace cable housing, make sure everything works safely on it, and they sell it for a profit. He also told me he re-taped the bars on this one. I asked him to bring the Motobecane with him that was another listing of his. While I enjoyed the look of the Motobecane more, he admitted that he was having issues with the seat post, so he would not feel bad if it did not sell.
Anyways, long-story short, he was an honest fellow, and I would definitely do business with him again. I'd also like to know where he gets the dumpy bicycles haha.