Ditto on the robwebb recommendation. The guy knows his stuff and is reliable, he's been selling this stuff for years. I did check earlier to see if he had any cheap modded Saturns going, as a mate of mine got a NTSC-J Saturn modded from him for about £60, but the price is a fair bit higher now. He has modchips for a tenner, anyway. It's always worth keeping an eye on his site as he gets some interesting stuff now and then.
another option would be build one to your specification. The one I'm currently out under the CRT TV is the hybrid that I built from busted/old JPN and PAL consoles. I used JPN shell, PAL MB and PAL PSU. Am keeping JPN MB as spares... Since I had couple of busted/battered consoles didn't cost much to build one working unit. If you ever come across next to nothing tattered units it'd worthwhile - provided you're not afraid of unscrewing and swapping the big components. No soldering will be required unless you want to modify...
