How to determine value of large trucks? Can't exactly use KBB and I did a few min of searching to come up with mostly nothing..........is there a particular www? I've found a 2001 FL70......130k on the chasis and 40k on the engine with 6spd Fuller. CAT power and was replaced under warranty due to a past defect. Asking $19,900 and I think I can get it for $17,500.......its a box truck, looks good. I think its 33k GVW weight too.