Honestly though, at least have the newest Pi model... at MSRP $5, the S&H would cost more than the Pi Zero with bulk discount...
And at $5, the bulk discount really wouldn't even be that much!
If your going to build a game emulator the Raspberry PI is the only way to go. It will run any retro game perfectly, even N64 games like Starfox can be emulated. Its still pretty small , about the size of a credit card, and can be used with any hdmi monitor or a Tv that has composite video.