2004 GMC Duramax - $7,500 (Klamath falls)

I have a 2004 GMC sierra Duramax up for grabs only reason for selling is I am moving and need the extra money truck does have cosmetic damage to the exterior on driver side the original owner I purchased the truck from said he had put another motor into it.
truck has 317,000 miles, last owner stated that the new motor only has about 90 K on it.
I know a lot of people can be skeptic about another motor being put in but I believe the original owner not only did I work for the guy he is in his 80s and when you go to buy parts for the motor in particularly you have to buy for an 05.
Has clean title runs really good.
Have a 3 inch aftermarket downpipe everything else is completely stock.
Just put in a new set of glow plugs starter and flywheel have just been replaced.
New serpentine belt.
New fuel filter and primer housing.
Interior is flawless aftermarket CD player Bluetooth compatible with SiriusXM radio.
Comes with a race fuel plug and also a PPE up pipe if you’re wanting to do a EGR delete not looking for any trades and will not budge on the price.
Thank you.