I've got a lot of these. All brand new.
-They are basically idiot proof. They are pre-wired, so all that you need to do is solder four points on to the Dreamcast mobo. They are pretty good sized points, too. I suck at soldering, and I pulled this off quite easy with a Cold Heat iron (which has a huge "tip")
-$10 a pop + $1.50 shipping. $.50 for each additional.
-Shipping to Canda: $2.50; shipping to rest of world: $3.50. $.50 for each additional.
I will post pictures of the chip tomorrow, along with installation instructions (made by yours truly) to scope out.
Alternatively, if you really hate soldering stuff, then I have region free Dreamcasts available for $50 + shipping, which includes a controller and all hookups.
PM me if interested. I accept Paypal, money orders, checks, or cash.