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He did not indicate that it was a reproduction at all, but even if he did it would be against ebay's policy to sell counterfeit goods. I filed a report, will post back what happens. That's what I thought, how can you tell it is an EPROM and not a ROM? Did you just know the chip number? or is there another obvious give away?

After a bit of searching, it looks like the seller Charles L Guinn, voltman3 on atariage, and ebay is already known for selling repros, and homebrew without permission. I guess I'll report it, what a bummer. http://atariage.com/forums/topic/249780-voltman3-s-fake-homebrews-on-ebay/ http://atariage.com/forums/topic/229886-fix-it-felix-sr-atari-2600-on-cartridge-on-ebay/

I uploaded them to imgur, feel free to repost them to the forum if you want to make sure the link doesn't die. http://imgur.com/a/YQXiB

Hi Everyone, this is my first post here, but I've visited occasionally for over 10 years. Last week, while not entirely sober, I purchased a 5200 Diagnostic cart from ebay, and it just came in the mail. I think that it may be a reproduction, and I'm not sure if I should report the seller or not. I was hoping someone could help me make a proper identification. Some reasons I think it is a reproduction are below: The label is very clean and shiny, in better condition than any of the games I own. The back screw was missing, meaning someone had taken it apart at some point. The board does not match the one shown at http://www.atariprotos.com/5200/software/diagnostic/11.htm The ROM was definitely re-soldered at one point, you can tell because the solder is much shinier than the rest of the board, and there are burn marks from de-soldering. PINs 15/16 are directly soldered together, I don't know if this is by design, or just a mistake on whoever put the chip in. I had trouble uploading pictures the first time around, so I will post this first, then upload them as a reply.