I bought the truck new in 2006. It has 140,000 miles on it now.
I paid $37,000. I had to replace injectors once $2400. I added a Edge Juice with Attitude tuner box at 80,000 miles. That cost $950. I also added an Airdog 165 lift pump at $650. I had the transmission rebuilt at 130,000 miles. I over built it to be safe that cost $8000. The transmission is rated at over 1000 hp.
That is about it except normal maintenance like brakes ect.