Nicola already mentioned this, but I wanted to provide some more details. Also, I like this auction as most of these that show up tend to have a high priced BIN. Currently, this one is more than affordable.
This counter tester is a revamped version of the SNES Test Station addon. This was offered to newer Service Centers as a way to diagnose the possible failures of systems and accessories. It used a simple pass/fail detection method with green and red LED lights to automatically test AC adapters, RF cords and AV cables without being hooked up to a TV. Included with this sytem was a Test Cartridge that was created exclusively to test the Super Scope.
Also:
1992 Nintendo Super Mario Bros. Clock
Coleco Vision Video Club Experience Magazine & Stickers
Nintendo Gameboy Advance Yoshi’s Island Vinyl Banner
Fallout New Vegas Promo T shirt – Fetching a nice price.