Panasonic Q pricing

I'm not sure if this the right forum for this, so please be kind. I need to know what is a fair price for a region modded Panasonic Q Gamecube. I know where I can get one for $250 boxed. Please let me know.

P.S. Maybe there should be an appraisal sub-forum in the selling forums.

I think this would best be placed in Unrelated as this forum is for the Neo.