I have a nice Thomas safelight with a couple sets of filters. It has a minor dent that was repaired, and otherwise works fine as far as I can tell. Let me know if you are interested and I can take some pics.
I emailed the guy on ebay with the CP-51, and asked for pics of the inside of the main body, but he never posted them. it does sound like it was run dry (a big no-no). He also will only ship freight which is a big hassle. (UPS will ship these, and I told him that but he didn't believe me).