I would add the US version of the Super Game Boy 2 to your list. Only released in the united states via Qvc if memory serves me right. Ive never even heard of someone claiming to own one.
Oh, and Im not sure about the Best Friends Bundle, I get the impression those aren't nearly as hard to come by as people percieve, nor will they be.
But Ive been wrong in the past...
"Dude, it comes with a modem built in! Theres no way the dreamcast wont be the leading console."
Oh 1999...