$17,000 is what I paid on 10/11/08. I picked up my used 2006 3520 with 110hrs, ehydro, 300cx loader, and the "standard bucket". Bought it from a dealer but I did it in Oregon so I paid no sales tax.
Previous owner traded it in for a 4x20.
I made sure to remind the sales guy about the economy, stock market, and how "luxury" items are hard to justify nowadays. I also told him I was seriously considering orange and I could get a new comparable kubota for significantly less.