RDO, huh? Can you haul the tractor yourself? If you can, or have a way to manage that - it gives you alot of leeway with regards to who, where and what you have to pay! 'Cause it won't matter a whole lot if the tractor is 500 miles or 5 miles away! And the dealer will oftentimes become "more flexible" when they understand that..
Tractor looks alot like my 2011, JD5075M.
Haven't looked all that closely at the '10's, '11's and the '12's for subtle differences. But, I'm kinda feeling a bit sketchy that it's really a '12 model. Just ask the salesman to run the plate number (on the tractor frame rail) and you should get a printout.
If you're interested in working (long-term) with this dealership, you might be able to better swing the quote in your direction with some "field installed" options. External mirrors, front weight bracket, adding more SCV's - mid and rear, rear fender 3pt control switches, fender extensions, extra lights front and rear, wheel weights, radio and blu-tooth connectivity.
I don't know how you plan to use the tractor but if you need to use it with some heavy mowers, discs, cultivators or planters (you could easily go 6-8 row stuff with a 5085M) the HD hitch option would be worthwhile, too. And that can be a field installed upgrade as well.
Of course, there's the loader and grill guard to consider. If you're planning to do alot of bale hauling - I'd really consider the 310MSL. Long-term; I'd have to believe that the 310 would hold up to the hard use that big bales can dish out than the 260 would.
AKfish