What does everyone think of this truck? It should be able to snag it for about $5000. The seller says it runs rough until it warms up then it just runs okay, not great - any thoughts on what that might be? Look like its worth messing with? "2000 GMC 3500H.D. 15,000 GVW. 59 K MILES. 6.5 TURBO DIESEL, 4L80E TRANS. 225/85/19.5 TIRES FRONT 75% REARS 45% RAN VIN # TO DEALER, THEY SAY MOTOR WAS REPLACED, GM CRATE. A/C , STEREO, ECT. DUAL TANKS 10' DUMP BOX ELECT. HYD. SELF CONTANED UNIT. TRUCK RUNS ROUGH WHEN COLD, THEN SEEMS TO RUN OK."