So I'm gonna toss this out here first, before I put it up on eBay or in the sales thread.
I've got a Model 1 Genesis, VA6. It has the EXT port. It's in good shape, but has the usual slight scuffing on the top that nearly every damned Genesis seems to have. Better than most, but not pristine. All aspects of it are in clean and working order. The sound is excellent. Comes with a controller that has the red buttons, accurate to what this system would have included at the time. AC adapter is there too, of course, and is original Sega brand.
Included with it, I've got a Sega CD Model II expansion plate in perfect condition. This is the little plastic wedge that makes a Model I not look stupid on a Model II Sega CD. It has the metal plate that connects it, and both associated screws to connect everything securely. I've seen the plastic piece alone go for like $20 on eBay, and that's a stupid price without the metal plate / screws.
I have an RF connector that nobody will want, but I'm also going to include a RGB JP21 cable that includes the 1/8" headphone adapter. This passes actual stereo to your XRGB Mini, or whatever you're using with SCART. Just be aware that it is in fact the Japanese version of the cable, and not the Euro. It'll work natively with the XRGB Mini and the adapter it comes with.
I'm up for trades, and I'll put pictures in this post tonight. PC Engine trades are of the most interest to me. PayPal's okay too, though, and I'll cut a very good deal on it with the folks here.