I wouldn't dare to mention a price, as this isn't any ordinary game, it's the start of a popular franchise, and people into the franchise or otherwise into retro are crazy enough to pay insane sums.
As for the latter, I think it's no problem. After all, wasn't it the idea of the MSX standardization that an MSX game runs on all computers bearing the MSX logo?
I've got an european metal gear for sale in mint condition.
Mail me if you're interested and I will send you some pictures (msxrestarter at hotmail dot com).
Works just fine with any japanese msx AFAIK, but if you tell me what machine you're using I can tell you for sure.