I agree on the test board after looking at the contacts. For the 2600 pro-line controller the thing I find interesting is all the pictures I can find have have the line series 2000 pro below the Atari and mine does not.
As for selling the only thing I might consider is a couple of the Atari 2600 roms.
I used to work for AMI semiconductor. The produced all the roms for Atari. the first three pictures are engineering roms for the 2600 with the socket test cartridge. The last picture is I believe a test card for the 7800 but not sure.
Front and back of the prototype controllers. The interesting thing is the top buttons are not recessed like the production and of course the Atari red and green buttons on the keypad. The stickers on the back were also pretty cool.
My Uncle was a VP at Atari when I was growing up. Last week I had the chance to go through his Atari stash and got quite a few awesome things from the system X to engineer sample cartridges.
Looking to having it restored. Do you have any recommendations?