I use the same method as gabshere to remove the post, except that I don't bother with a clamp. I just wrap the chain around the post a couple times and start hoisting, the chain won't budge after it gets some pressure against it. Although don't underestimate the size of chain.. a small chain will snap and leave a nasty ding in your buddy's pickup truck (or so I've "heard"). And make sure you use the "bumper loosening" technique - it makes a ton of difference (literally!) . I bent a cheap hoist because I tried to "bruit force" the post out without properly loosening it from the ground.
As for the dish, I've never disassembled one from the post (but some recommend this). The only disassembly I've ever done was when I wanted to store the dish in my basement (It wouldn't fit through the door without disassembly). 3 fairly muscular guys (i.e. no beanpole guys) can handle just about anything under 12ft with a little sweat (if the pole is low enough to the ground) using no tools other than a wrench to loose the mount's bolts.
I just loosen the bolts in the mount that hold it to the pole (unburry the cables and toss them into the dish so that they are not under foot, or snip them off if you're not taking them). Then I have one guy on each side and one in the back. "Gently" rotate the dish from side to side while lifting up (trying not to bind the dish on the pole as you're lifting). When the mount is off the post, rest it on the post while the two guys on the side stablize things and slowly being tipping the dish back. The 3rd guy will "catch" the dish while walking back from underneath it as it slides backwards and down. Now it's on the ground, so just pick it up and lift it into the back of a pickup, or better yet, onto a flatbed trailer. Tie it down and take it home.
To mount the dish, do the reverse.
I guess finding it will be a crapshoot. 
Looks like the 920. I think I did pretty well.
