Replaced complete exhaust from engine-back. $80. (I work at a muffler shop).
Replaced front brake pads and rear brake shoes. $70.
Had to give it a tune up after powerwashing the engine. Moisture got in the ignition wires. Replaced all the plugs and cap/rotor at that time. $80.
Put new tires on it. $320.
CV shaft boot cracked, replaced the whole shaft. $35.
New thermostat and cooling for preventive reasons. $30.
This truck is a little monster. It's super reliable and really fun to drive. It's got enough torque to pull or push an RV or small bus. Honest, I have done it. I have pulled V-8 Fords and diesels out of the ditch and pushed a short bus onto the ramp in the shop. I have even pulled a scissor lift with locked up brakes. This little Nissan has got more balls than any newer V-8 truck.
The negative is that it is geared really low, limiting your cruising speeds at highways at around 55-60 mph. Anything faster kills gas mileage. Also the short cab doesn't have much room, which means no long trips.
The biggest thing with these trucks is rust. The body just goes. The bed especially. Other than that they run forever with little maintenance. Nissan's true workhog.
I definitely recommend this truck to anyone who is looking for an all out true heavy duty small work truck, and does not care about comfort or looks.