There is no reason to get the warranty anywhere else. Unless you live in Florida.
There is a work-around you can use if you live in Florida - no reason to be ripped off just because the legislators in that state believe that the average IQ of their constituents roughly parallels that of a cucumber. Scan this thread for the link to the post in question.
And . . . since there is no price penalty and interest rates are as low as they are, if you are planning to buy it, do not wait for the last day to buy your YES - it isn't going to get any cheaper.