abc_exporters

I bought 3 and a half (the fourth system was basically the shell and board) Atari systems a couple of days ago and I need help idenitying them and getting them to work properly. I'm pretty sure one is an Atari Jr. 2600, Atari VCS - CX2600A and Sears Video Arcade (how do I know if it's a heavy sixer?). I have gotten all of these systems to work, but the picture is really poor and the sound has alot of static. I'm just curious if I have the correct power supply (output 9.75V DC 650mA) and hook the systems up properly. I have an automatic TV/game switch from Radio Shack, which hooks directly up to the Atari Jr. (I use a phono jack coupler that goes connects the other two ataris). My TV is kinda crappy, but I don't think that's the problem. I would like to figure out what the problem is. I also got in the deal a video game center, which holds the Ataris and games. I have not seen anything like it on any Atari sites or eBay. Does anyone know what exactly it is? There were around 10 controllers included I'm guessing the best way to test them is to use them. Also I got a couple of old boxes in the deal, about 38 in all including a Atari VCS - CX2600A box. How much would you say the hold lot would be worth? Thank you for your time.

Just curious could someone tell me what exactly this is? I keep on seeing these mentioned on the boards.