Just bought this 5302W on ebay, $14.99 BIN. The case doesn't look too bad either, from the pictures you would think it's display-ready but it'll probably need a cleaning and polishing. Doesn't appear to have any Bell System markings on it, and no ringer adjustment (if the ringer is present, I can't tell).
I haven't received it yet, I'll have to post some pictures once I get it cleaned up.
From the auction:
