I've got a Release day Nintendo DS (Phat model). Adult owned, great condition and flashed. I also have a M3 cart with a couple compact flash cards to go with it. It has a carry case and the metroid hunters demo that came with it. I'll throw in the passme as well, even though you'll never need it.
I'm considering upgrading to a DS lite and might sell it or trade it off.
let me know how much you might pay for it.