That's close to what I did. 2.5 hour drive, one way from southeast Missouri to Union City, Tn to pick up mine. He was asking $750, offered him 5 benjamins and i'd pick it up the next day. I may have had to drive 5 total hours but I'm pretty sure I could get my money back out of it, if I were ever to sell it. There's something to think about for you too... they hold a decent value it seems.
There is actually a 1-2" width difference in the beds from like 04-12, then 12-18 (I think) are the same. The one I have was bought new for an 08, but it still fits my 12 nice.