I paid $1100 for a 5 yr extended(RPM One) from Ocala HD when I bought my bike. Factory warranty just expired so I'm covered until 2017!! And yes, prices are all over the place.....
I just bought a 7 year ESP with tire & wheel coverage from Jim Palmer at Kutter H-D for $1850. The 5 year with wheel & tire was $1337. If you plan on keeping your bike for a long time, if you plan on riding a lot of miles, and if you plan on doing lots of trips away from home (where your tools are), it's money in the bank.
Call jim Palmer. Usually the best prices with tire/wheel coverage. You can buy it anywhere and its good everywhere. A 7 yr extended CNA warranty will extend you five more years past the original two years of factory warranty.