Take it from the old guy - always always ALWAYS keep EVERYthing you take off ANY vehicle you own! The few sheckles that you make selling it MAY keep it from selling down the road; ask me how *I* know! Folded up, that seat takes up very little room; hell, stick it in the attic in a contractor bag! Wrap up those seat belts too...
We all know that the rear seat is practically VESTIGIAL in the VX, but the PERCEPTION of the usability of the rear seat just MIGHT be what sells the vehicle to the next guy (or being able to SELL the usability to the guy's wife may be what sells it!). Just my 25 cents....