I've actually thought about doing this with my Lang 60D w/40" chargrill. I love my Lang too much to just "let it disappear" from my site. It's just not worth the $100 or so I'd make. Now, I don't mind BRINGING my Lang to someone's house and COOKING on it for them - but just letting some guy come get my smoker, ummm, I just can't.
Lang 100 Deluxe trailer rig (60" smoker w/warming box and 40" chargrill)