Back to the original question, I'd see no real reason not to buy just because it's been dropped on the cylinder head. I dropped a BMW Off-Road School GS on the cylinder head and a sharp rock punched a hole straight through the head cover (not a guard, the actual cover). Bike was up and running with a replacement cover within about 30 minutes...
So while preparing to do the trade yesterday my dealer and I were talking crazy - I proposed 4K off of a new '16 and he said let me see - came back at just about that (including current July incentives). So would you take a new '16 at 4K off MSRP or the '14. After trade-in the '14 costs me about 5,700 USD and '16 about 13,000 USD. Taking my wife down to help decide.
Depends how important 8 1/2K is to you. But that's a lot off a brand new one so I would be tempted. As they will be getting next years bikes in before too long try for a bit more off.
Exactly why I am in a dilemma . I think it is a 7.5 k diff but nonetheless a lot. Only real extra feature on '16 are keyless ignition, alarm and central lock. Nice features for sure.