I know 6 months ago I was having a hard time getting $4700 for a HUO original owner IM. I was trying to trade for just an AC/DC as well and never ended selling. I did end up with a trade of 4 machines which I sold for around $5500 total, and I did have to put a little work into them.
I would say cash price on an IM may be $5000 right now. As hot as AC/DC is right now especially the premium, your going to have to put it somewhere between $500-1000 for a trade.
Loved my Iron Man, had it a couple years was time to move on, get an AC/DC pro right now, and love that. May try and get a premium myself at somepoint, although I do hear it is much slower pace. This pro is fricking fast.