I think finding a deal is what kills you. You'll always have the temptation to flip it for more money. When you overpay, there is no once.tube to sell it. (Although that doesn't stop me from trying )
tyson, you are welcome to come and take my trailer for a night (as soon as I get the spring mount fixed). It has a RTT on it and has hauled some decent loads of junk in its day. It wouldn't fit dirt bikes, but might give you an idea if a trailer is something you want to pursue.