[quote:7f0f420e37="drx"][quote:7f0f420e37="billscat-socks"]I'll just post this which evilhamwizard also posted elsewhere:
http://img146.imageshack.us/img146/246/prototig3.jpg
[/quote:7f0f420e37]

Oh hey, I know who owns or owned these.[/quote:7f0f420e37]

Hehe. I know ;)

Anyways, here's the important parts of what he sent me.

"I played them all and there where no differences what so ever."(he's not just talking about Goemon, but everything else that he found with it. Tonic Trouble was one notable game :)
"If you look at n64 prototypes in general there are almost no differences with the released versions.
The reason for this is the price these carts where very $$ and so early versions stayed on pc for perfection."

Makes sense, I think that's been mentioned several times on other forums, and is one of the main reasons finding a Mother 3 proto is unlikely.

Of course, this can't say one way or the other regarding this proto, since no matter which way you look at it it's still possible it could be something worth it. Anyways, people should at the least be aware of what was said above and keep that in mind.