2003 Chevy Duramax 2500HD

I have a 2003 Chevy Duramax 4x4 for sale. The truck is an extended cab, short box. Pewter in color. Great shape, no major dents or scratches. It has 109,000 miles on it. This is very low miles for a Diesel truck, let alone one that is 8 years old.  The Allison transmission shifts and performs like new. It has a brand new set of Firestone Transforce AT's on it, they have less than 2,000 miles on them.  About 9 months ago, it was having troubles starting, diagnosed as injectors were going out (quite typical for the Duramax LB7 motor 2001-04), so I replaced all eight of them. A little more than $5,000 in replacing them. Aftert that, it starts like it used to and the mpg went back up to 17.5 on the highway.

I would like $18,500 for it, but any and all reasonable offers will be considered. I do not want to sell the truck, but I am starting a new business and have bought a new truck for the business and need to sell this one so I can get the rest of the items I need for my business.