I have the replacement 550QE and love it, I paid $3500 for it and it came with all the feet along with the BSR and the Free Motion capability and a carrying case on wheels. It was during the Sept. Bernina special I think the original price is close to $5000
I'd check with some of the local LQS and see if anyone has any class models to sell our's does quite often. A lot of people on here have success with Craigslist.