Nine of these bad boys were made, but one was destroyed in a truck crash, so that leave eight (for the math impaired).
There are not any bids currently (opening bid is $40,000), so if you ever wanted to be the supreme Star Wars dork of the universe, here's your chance. One of these things were actually auctioned off in the past for $135,000. Also, it should be noted that shipping is free on this thing (not sure if they are going to put it on a truck and bring it to you, or actually fly it).
Check out the auction here.