I just got the 3720 with Deluxe Factory Cab. Salesman says it should be at my house today. My total package involved: 3720 with Deluxe Cab, Mid PTO, Air Ride Seat, Dual Mid & Single SVC, Electric Diverter Kit (total of 3 sets of rear remotes), Cab Speaker Kit, John Deere Weatherband AM/FM Radio, Optional Rear Wiper Kit, Audible Horn Kit, Cruise Control Upgrade Kit, Vertical Exhuast, Larger R4 Tires, Filled Tires,
Ballast Box. Rear Auxillary Work Lights Kit. John Deere 300cx Loader, with 73" Heavy Duty Bucket Drilled for Reversible Cutting Edge, 73" Reversible Cutting Edge, Deluxe Hood Guard, 3rd Funtion Hydraulic Lines for Loader (in case I ever need them easier to do now than later). 74" Heavy Duty Rear Mount Rad Ber-Vac Blizzard Snow Blower, with Optional Hydraulic Chute Rotation. The Whole package came to about 37,000.00 as of yesterday, the tractor was done being spec'd out. They were just waiting for the Snowblower to arrive from Canada. So maybe today will be the lucky day... waiting sucks... haha.. but to answer your question, the least it adds is 6000.00 you can go up from there with other options as I did.