I was gonna say... the JVC x-eye is the only good thing he has for trade. It's a Genesis/SegaCD merged into one unit.
It's a pretty sleek lookin' machine. They're worth about $100 on ebay... and the only other thing he has worth anything is the Saturn, which'll probably go for around $50 on ebay.
It's up to you, but I wouldn't trade...
You can emulate all those systems on a crummy laptop (except maybe Saturn), while you can't enjoy 360 games any other way than with a 360.