I don't know if I was willing to pop $400+ for a TS I expect to get something that is medium quality but looks fairly new. Even med. quality is a very good TS. Paying $400 for a really old saw even if it works good, there are things to considers, such as motor may go, bearings may go, etc. There is no guarantee with a newer used saw either that is why the name is important, thus the parts inside should last, and thus a newer saw should have no real problems.
Here are a couple more examples of potential good deals. I know thing about these particular TS / brands, again I can only comment on Craftsman 22124 or 22114.
Oklahoma Northwest Ok PostingID: 2571966526
Oklahoma stillwater PostingID: 2604122746