We paid $150 for ours, and another $40 for the stool off ebay (because I had to have a matching stool, you know . . .).
It came with a beautiful 15-91 and attachments. The sellers had bought it around 15 years ago because they liked the desk - and never did a thing with the sewing machine inside.
We were willing to pay that much as it was only an hour away, and the truck is a hungry guy to feed if we have to drive 2-3 hours away to get one. It's different when we can fit something in the car.
I have paid all accross the board for cabinets and machines - I figure it evens out in the long run, so I don't mind if I have to pay through the nose once in a while, as I've been given a few and got some others dirt cheap.
what is funny - some of the machines that would sell for the most on Ebay are the ones I got free or near free.