I haven't used them BUT had a buddy who wanted to sell a 5th Wheel Toy Hauler. He talked to a similar place who offered to buy His rig for less than 1/2 of what he eventually got by advertising it Himself!
I guess the bottom line is How Much Money do You Need to get to let it go?
Rob & Jean
98 Dutch Star Diesel Pusher ..92 Tracker 4X2