If it's exactly what you want, the price is good, go for it. It is 5 miles away from where I just got mine! As a side note, Illinois made me get a notarized statement from the previous owner that it was not harmed during the recent hurricanes before I could title the bike.
I have bought two cars that had ridiculously low miles on them, and both had issues like dried out intake gaskets, brake lines rusted from the inside out, transmissions (automatic) that were full of gunky fluid and exhausts that were rusted out from rarely getting warm enough. That bike has been sitting for 7 years in a very salty environment. I have NO idea if the Rocket would be susceptible to these or other issues, but if it were me I'd be looking for a bike that was more in the 'standard usage' category.
I just got mine, so I know how hard it is to look objectionably at a bike that could be perfect, but might not be the right one.