What i'm about to say will most likely be frowned upon by the whole gaming community but hear me out.
I could never justify spending $2000 for ANY game. Don't mean to come off as a crude arse but seriously.. there are people going without food and if you're willing to toss $2000 around like it's nothing - you don't deserve it! Put it to good use. There are charities, causes, homeless people, and even programmers like matt that could make great use of some serious cash like that.
Personally, if it's not for the reason of collection then i'd just get an emulator to play it. They even have flash based emulators running now. The down side to pirated games are that it's stealing from the developers and hurts their cause. Most rom companies aren't even in business anymore so the developer will NEVER see a dime of what you spend on a game. The only pockets you're hurting are the people like this, selling a classical collection item for so much money.
Just to clarify I do NOT endorse pirating, I do however encourage stuff like rooting, jailbreaking, theming, etc.