Just take your time an look around, Bough the truck in my sig. with 165k miles on it 3 years ago for less then your budget, lots of nice 7.3's out there. All of my last 3 TV's were used older vehicles. all of them were towing a 8000lb Sunline trailer. 92 R1500 with 350 3:73 gears towed the 8000lbs great had 100k miles on it when purchased cost 4K, Then 93 K2500 454 3:73 gears had 44K miles on it one owner cost 8K it towed the 8k Sunline and 11K Montana TT. My son bought a one owner 2002 Dodge 2500 with 5.9 diesel with 260K miles on it, cost 4K. All of these TV's are still in service except the 92, rust got it, the motor and trans were installed into a Camaro which is still running. There are lots of very nice older TV out there just take your time and look closely, get carfax or auto check on the ones you are considering, I mainly use the registration data from these to determine where they were usesd and how they were used. I have seen repainted flood vehicles out there and the and these reports help validate condition if you are good at looking.