Sounds like a very good price. I paid around $26,000 for mine two years ago. My price included the front quick hitch/blade, every cab option, two rear remotes and a skid steer type Q/A on the loader (Tach-all). Just traded mine in on a Grand L 3240HST.
You are right, the dealer can't do it.
The quote listed the B3030HSDC however when I contacted other dealers they laughed and quoted $24-$25K. The original quote was wrong and according to the dealer did not include the cab.
I got 2 quotes today for a friend of mine, B3030,HSD(no cab) turf tires 60MMM, and a Kubota loader LA403, 20,825.00+tax in Morristown ,TN, and a quote of 18,900.00 + tax, from another dealer in Abington, VA, about 70miles apart, big difference,