I had the same thing happen to me except (im a fat guy too and agree with IMADREAMER) i bought a harley davidson fatboy. The bike was 18000 and by time i added all the extras it ended up costing about 24000 before i even picked it up ...... well that was 6 years ago and i just sold it about 2 months ago ..... no time to ride cause the vette is more important to me, and safer.
moral of the story is times are tough for alot of people that might be why you got a steal on the bike, dont expect to get what they are telling you it is worth. Mine was in mint condition and had 8500 miles on it they told me it was worth somewhere in the 14-15000 range, i got 13000 after having it for sale for 3 months.
Riding is a passion, i will always love to ride and will one day have another bike. Always remember keep the rubber down and watch others around you.