I bought a Bernina 440 with the BSR back in October for $2500. It was used -- original buyer traded in for an upgrade. I bought it from my LQS, a Bernina dealer. I saw one on Craigslist for $1800, but without the BSR, around the same time.
It took me many years to get to the point where I could spend that much on a sewing machine. Not just able to afford it, but also feeling ok to spend that much on a sewing machine! But I have not had a single regret. I LOVE this machine. I've done more sewing in the last 3 months than I have in the last 20 years combined, and truly enjoy it.
Keep saving and get what you really want. It'll be worth the wait.