That's a whole lot of hours, but the machine looks decent. I'm impressed that the grille is not all bashed up. Perhaps it was only used for mowing or light snow blading or something? Front wheels are turned around so that could have worn on the front end components. If the machine starts without ether and runs without hazing blue smoke and does what it's supposed to do, it's probably worth 3500 or 4 grand. If the current owner put a lot of the hours on it, that would also be a good sign. The problem will be selling it when you are done. Machines with around 4000 hours are assumed to be 'used up' and will have to sell for cheap or get parted out. This machine might serve you well for 1500 hours or it might crap out on the first day out.
Obviously we like to spend your money around here. Do consider that money invested into a tractor and equipment isn't gone forever. You will sell it someday. You will upgrade to something bigger / newer / better for your use. A good tractor that is bought for the right price and maintained well should recover most of it's value when it sells. My first tractor was a (used) New Holland TC30 with loader and backhoe. I paid $13,250 for it. Over the 4 years and 500 hours I put on it, I spent another 500 dollars or so for maintenance and repairs. Maybe another few hundred for fuel. I sold it for $14,750. That's right. Got back every dollar I spent on fuel, oil, repairs and maintenance with a little extra. Not impossible, but it can be done with careful shopping, cautious operation and diligent maintenance.