http://rover.ebay.co...&mtid=824&kw=lg
I bought one just to have it as part of the collection, but I don't use it. If you like to switch back and forth between Coleco and Atari games, you might find it gets inconvenient to use because you have to disconnect the expansion from the CV before you can play CV games again. That is, unless you mod it (I don't remember where the link is for that). Also, if you use the CV controllers, you have to unplug them too. Almost better to just get a 2600.
As a caveat to what I just said, I have also heard of people modding the Expansion #1 to be completely independent of the CV. It apparently makes for a nicely compact 2600 console.
Hmm yea good point. It looks as if the atari expansion module costs nearly as much as a 2600 too. Maybe I should just get a 2600 separately then.