I don't think the fact that there is no support for a console by the original manufacturer or if games are made anymore has much effect on the price. People who collect consoles don't buy them to play them so those features wouldn't matter to them anyway. Granted they probably want to buy one that they know works even though they never plan to use it.
Same thing probably goes for games as well. Rare older games still go for good amounts of money for consoles that aren't supported or don't have games being made for them anymore. Take the Dead Space Ultra Limited Edition for example. If you paid $700 for a copy of the game still sealed in the box are you going to open it and play it? A good example of a rare original game that has a high price tag on it is Stadium Events for the NES.
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