All of these people can answer general video arcade game questions, since any game is not entirely too far different from another. Each person has their expertise (if any) listed beside their name to help you try and narrow your selection and possibly get you a faster answer.
Do not contact these people about game purchases!
Disclaimer: These people are only here to offer advice. What you do with their advice is your own responsibility! They are not liable if you damage anything, including your game, game parts, tools, or yourself in any way by following their advice. Contacting any of these people is an acknowledgement of this disclaimer.
Mark Jenison - Sega XY
Wanna help people? Send me your name, the e-mail address you wish questions to be sent to, and your game/part expertise (if any) and I'll add your name to the list.