My sister and I bought our 6600P's 4 years ago. We purchased from a dealer in Semi Valley, CA. We bought the machine and the table for $1400. Both machines were brand new in box. I think your dealer is asking SUGGESTED MANUFACTURERS RETAIL PRICE.
I have a friend purchased her machine just last year. Exact same set up I have for $1200.
I suggest getting prices from other dealers, online and over the phone, for the same machine, take those numbers into the dealer. But $2100 is way too much for this machine. You can get a much better price somewhere else.