I own an 06 GMC 2500 with the 6.0 and I can tell you that you won't get what your asking on eBay. My auction ended at $8,900, you would top out at $10,000 because you have less miles. Your asking a diesel price for a gas truck.
There is an Old Blue Chair for each and every one of us, we just have to find it.
2015 Ram 3500 6.4l hemi 4x4
BOSS 8'2" VXT
Hustler X-one 60" 3 bin bagger
Toro Proline 36" wb w/t-bar controls
Walker S14 36"
Shindaiwa T242, Echo trimmers, chainsaws, pole hedge trimmer, pole saw, hedge trimmer
Shindaiwa 633 and Echo 755