I am now the proud owner of a Heavy Sixer Atari 2600. The SN is 45008K. For description of the heavy, go here. Didn’t come with controllers or the original grey power supply. It did come with the original Combat cartridge and a 2nd generation power supply.

A little beat up, but it seems to work fine. I did have to repair the AC plug. The other thing I noticed is that quite a bit of force is needed to get the controller to plug in. In the picture below, my light sixer is on the left, the heavy on the right. I have owned that light sixer since 1979.