I bought my DX in 1992, I don't think they had been out long. I sure would not sell it for the prices quoted. I think this era of the early to mid '90's S&W made some great guns. Almost all seem to be timed correctly and consistently, with good fit and finish. If it has not been abused with very heavy loads of heavy bullets, it should be a fine purchase and last a long time.
I recall I paid about $600 for it new and was glad to get it.