2001 GMC C6500 TOW TRUCK 20ft FLAT BED!!

Fully rebuilt motor + turbo. has 6 cylinder 7.2 Caterpillar engine. has Allison transmission that was recently serviced. New transmission computer. Clean title. power windows. has heater. has a/c but for some reason compressor wont kick on. replaced a/c accumulator, a/c condenser and serpentine belt. has really good tires. front ones are Michelin and rear ones are Goodyear. Has new mud flaps. I replaced the fog lights and all the work lights with some bright led ones. also replaced the beacon light with a bright led one as well. has tinted windows. replaced windshield with a new one. replaced the cable for winch with a new one. both sliding bed and wheel lift work great. fast idle works great. PTO works great. bed is 20ft length and 7ft’ 7 wide. asking $18,000 OBO. Thank you.