Nice! It feels weird to see a Super Famicom the correct colour - mine's yellowed big-time on the logo faceplate
SuFami boxes *are* lovely things, but the best bit about boxed versions is the little control layout card that comes in some of them. That said, the last time I looked at stuff on eBay, prices had gone through the effing roof, which is one of the reasons why I've not bought anything for it for ages. The way sterling's heading, I don't know when (if) that's going to change.
I've always wondered why JPN Super Metroid has an English text option. I don't think any of Nintendo's other releases did.
It'd be cool to find out what that unknown cart is, Shend, once you've had the chance to try it out.