Can you post pictures of the damage, I can't understand why the adjuster would be wanting to total the truck for a rear bumper and quarter panel, or even replacing the bed and painting it.
Insurance companys automatically total a vehicle when the cost of repairs exceeds 80% the value of the vehicle. If they are offering you $2400 then they assume that the repairs will cost at least $1920. I would take the $2400 total and buy back the truck for the salvage value and get it fixed with the remaining money. If they refuse to let you buy it back then get an estimate for less than $1920 and they should pay it and let you keep the truck.
I understand at what point ins. co's total a vehicle, however from his earlier statement it doesn't seem like the damage warrants a totalling of the truck. If the damage does exceed the 80% he still may not have to allow them to total the rig, and may be able to force them to pay the amount of damages caused to him up to the value of the vehicle. This is why I suggested he research OR auto insurance regulations, or contacting an attorney. An adjusters job is to save their company money, not tell you what your rights/options are. If the KBB value for the truck is $2400, and the damages are $2350, he should be able to get a check for $2350 from the insurance co. and retrain the vehicle w/o having to buy it back from the insurance co. Of course totaling the truck and selling it for scrap is in the ins. co' s best interest, however they aren't entitled this, their responsibility is to pay for the loss of damage to his property.
