Writing a game to a satellaview mempack is probably not all that trivial. You can see a pic at the bottom of http://bof2.blogspot.com/ that shows someone using a BS-X cart as a dev unit, though, so maybe it's not impossible.
Certainly, I've never heard of anyone doing something like this before, and the fact that the price is so high suggests that if it is possible, it's not something that a lot of people can do.