So i'm looking to buy a 7.3L Powerstroke. I have a 8.5x20 enclosed trailer that we pull everyday. Currently i'm getting about 9-10mpg with my Silverado 6.0 GAS. Iv found a few F350-F450s that i'm interested in. http://raleigh.craigslist.org/cto/3210187162.html http://charlotte.craigslist.org/cto/3208210905.html http://raleigh.craigslist.org/cto/3245997561.html I like the 450 cause it's cheap and has a flat bed. (Tired of hand loading pallets) Only bad is it has 300k miles. I was thinking of just rebuilding the motor but I'm not sure how much that will be. Let me know guys. Also a budget of around 10k.