I'm the seller. I did hook a computer with ArcadeVGA up to it, and it looked like it didn't want to sync. I didn't hook a video amp up to it, so I don't know if it's a low signal or other problem. The monitor is NEC, and has several adjustment knobs that I don't know what their purpose is.
I would say that if you're looking for a plug and play setup, it probably isn't for you. It may be a simple adjustment, or sending a 5v signal to it but I can't say for sure. I bought it for $80, and am selling it for the same price because fixing it is beyond my skill level. It's a pretty nice looking unit, but I wouldn't want anyone to be unhappy with the purchase.