I bought a TC33D last summer for $17,500 with filled R4 tires, block heater and 66" HD bucket (actually, I bought a Woods 1012 FEL with it, but the price I mentioned was for the NH 7308). This price did not include any attachments other than the FEL, so if your price includes the box scraper, you have a decent price. (I could have done a bit better from a dealer a few hours away, but decided a few hundred bucks was worth having someone local with a great reputation for service and customer support) I do know NH has some incentives going on, so you may be able to do a bit better, depending on your area of the country.
BTW... I would go for a 6 foot Box Blade with your 33D, to have enough to cover your tracks. That's what I ended up buying for mine, and I have no regrets.
John Mc