2500 HD

Hey guys I gota question. My dad wants to sell his 2001 chevy 2500 hd. It's a nice clean truck, 92,000 miles gots the 6.0. It's 2wd but it has a 2 inch lift on it. What do u think itd be worth. He was thinkin around $13,000. It has no dents, clean int. And everything. Exhaust, and bed cover. J/W if its be worth 13 grand

Anyone?