I've done alot of trading both here and other sites, and both parties walked away happy. It all depends on if it is really what you want, or is it something different you can play with till you pawn that off.
If you both agree to terms, travel, meeting to trade, etc, and money trading hands, and both parties are well enough informed about what their getting, all that is left is to do the deal. If you get cold feet, don't leave the other person hanging, see that alot.
Good luck to both of you.
BTW, looked at both ads, your buggy is pretty interesting. The truck is nice too.