So, I was just searching eBay again for some video games and such I've been wanting, and I thought to myself: "Why does eBay have to be the standard for retro video game pricing? The only reason these games are priced like this (most of them at least) is because this is what people want to get for them! Then, everyone who wants to sell their copies sees this, and prices their games accordingly!" I saw a copy of Donkey Kong for the Commodore 64 trying to get sold for 59.99 the other day. I wouldn't be surprised if all of a sudden, ONE PERSON buys one for whatever reason, and all of a sudden, that game is worth sixty bucks.
So this is my thought. Why don't we come up with a mathematical equation based on the amount originally sold of the game, the amount of time it was produced for, etc!? Then maybe games like Contra might be sold at prices according to the amount out there! Think about it: there are thousands and thousands of Mario Duck Hunt copies, and they're sold very reasonably because of that. And I know there might be significantly less Contra games out there, but still. It makes sense.
Please contribute, and perhaps we'll be one step closer to finding out the best way to price retro games.
~goob47