LOL, I didn't pay 10K for my diesel engine. :R :S
And if I ever did sell my Duramax I could get big bucks for my mint condition LBZ. My diesel is worth 25 to 26K. I could get a little over 20K for the same condition truck if it had a 6.0 gas engine in it.
Like I said, I'm already in the black with the diesel and every day I drive it I save because of the mileage I get. If I would have bought the 6.0 I would be losing money every day I drive and keep it.