I have a Sega Genesis Model 1 and a CDX which I bought later to simplify my setup. Now, the CDX is the one I use while the Model 1 sits in the storage closet.
I also have an extra toaster NES which was replaced by one I bought modded with the NESRGB.
Other than the above, although my main gaming system is a Duo R, I also have a CoreGrafx, which I purchased simply because it's so damn cute. I usually take that one out when I want to do some desktop gaming in the old Amiga 1080 monitor.
I might consider selling or gifting the toaster and Model 1 to one of my nephews or a friend, but the CoreGrafx I will forever keep. I think the original PCE and Coregrafx's are the best looking systems ever.