Angell, I bought mine through Diplomatic sales after a year in Afghanistan and I agree with Tech on many points.
As for "fair" prices, these vehicles don't come with a CPO warranty like BMW, so check Autotrader.com and Ebay for fair prices nationwide.
As far as year, you will be safe with any 2007 (most bugs were solved) and you can save a big depreciation chunk there.
As far as model, don't muck around unless you are on a strict financial budget, get the V8 HSE. You will get Nav, electric seats, bluethooth, Logic 7 stereo and all the other needed goodies. Being as you are from Ohio, you might look for one with a cold weather pack.
I took mine to Germany last winter with the crappy stock Goodyears and this thing goes through light snow (2-8 inches) like a madman.
I get about 14 MPG around town with a pretty heavy foot and 21-22 MPG on the autopista (Spanish highway) doing 72-75MPH (the limit). Highway mileage drops to about 18 at 85MPH
Good luck
Oh....PS. Gas here is about $8.25 a gallon and I still wouldn't trade this truck for anything!