It was discussed elsewhere. Can't remember which thread though.
Here's the gist though.
Arcade machines are too varied to have any sort of set pricing guide. Even from the manfacturer, it's possible to have the same game constructed differently. Either with different monitors, joysticks or even scavanged wood components from still other arcade machines. In other cases OEM cabinets can even be retrofitted with a differet game even before it leaves the warehouse. I believe Donkey Kong is a good example of this. (If I'm wrong I'm sure PBJ will pipe up and correct me.

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More importantly, creating a price guide would encourage sleazy non-arcade enthusiasts to make money by artificially driving prices high. eBay already does a pretty good job of that, thank you very much. When prices are driven too high, it would unfairly push this hobby out of reach of too many people.
Yeah, I thought the same as you, coming from hobbies that literally centered around publications like Beckett, Scrye, Inquest and others of the same ilk. But even in the short.. six months? I've been here I've spotted some really good steals and deals. The only thing I ever wonder is, would those $400 Tempest monitors drop in price or go up if a price guide was created? Oh well.
