I was looking for a used diesel pickup in 2011 and the Ford, Ram, and GM diesel trucks all had their share of expensive repair problems up until 2010 when all three improved dramatically. So for me it was the choice between a used 2010 or a new 2011. Today it would be the choice between a used 2010-2012 or a new 2014 truck.
When I was looking I wanted a diesel that still had some of the warranty left and had at most 60K miles on the odometer. At that time it was clear that the owners had paid too much for the trucks new and so all owed the bank $35,000 and that was what they needed to get for their used trucks regardless of condition.
I found a new 2011 that was fully loaded for under $42,000 so went that route. For RV type use I wanted something that would not break down in the middle of a trip out in some little town far from a dealer's shop.
I bought the 2011 some 3 months after the 2012 trucks started to appear on dealers' lots and so I was in a position to deal. My neighbor paid more for his 2012 truck with the gas engine than I did for my 2011 with the diesel engine and Allison transmission and I got the dealer to include $1800 in extras in the form of tow mirrors, bed liner, chrome side steps, and other goodies.
I also paid cash which made it easier to negotiate with the dealer. With cash and no trade-in there was less to negotiate and it was a much cleaner deal and that always is a better deal.