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Museum of the Game® & International Arcade Museum® Forums
Has a modern beefier PSU. Aside from that appears to be entirely stock. Boots into workbench just fine (though I need to change it off of PAL and into NTSC).
I don't have a use for it, or know what I'd do with it.
I'm seeing broken ones go for $400 on eBay without a PSU.
How does $550 as it sits sound? $750 with a GoTek and fully recapped.