I have the Genesis Blockbuster cart with NBA Jam and Judge Dredd. I got it off of eBay 4 months ago, and I private offered it 6 hours after the auction started. I check for friends for this every week or so, and have yet to see it. No one I have talked to have it, and only one has heard of someone having it (On gametz, and the guy offering was using it more as a taunt/brag).

The cart itself has no top label, and the front label is all text. Unless none others turn up besides mine, a R10 *may* be in order.

As far as the other BB carts for Genesis, I don't think they exist, because they weren't used for any competition.

dave