I didn't have a chance to welcome you the first time around, so "Welcome from Sunny South Florida" (will be riding today - sunny and 75 degrees).
I think the price they're asking is a bit high - it's a 2012, not a 2013 leftover, so there's about to be 2 years depreciation on it. Of course, if it's loaded with accessories, then that has to be taken into account. I think you should be able to save between 350 - 700 dollars.
And 511 km is just 1/2 way to first service, so make sure they include the first service in the price.