Jacques - Like anything else that you buy, you have to know what you are getting, have price compared and got references. I am not sure that you will get the best price by buying through a dealer. There is also no hurry; you have a year to decide.
I have mixed emotions about extended warranties and have only gotten them for very few items. For the moho, my DW talked me into one and I got the Xtra Ride policy from Wholesale Warranties. It is for 72 months, unlimited mileage and $200 deductible for $3,300. I guess the thoughts of the propane refrige going would justify the policy. So far the policy paid $1,000 for a hydraulic slide cylinder.
You need to understand the subtleties of extended warranties. They have fixed rates for each type of repair, wherein the service garage may want more; which then comes out of your pocket. For know fixes to problems, it is easy. However for intermittent problems with the cause not known, the extended warranty isn't going to pay for finding the cause; they will pay for fixing. Some sporadic problems can take an enormous amount of labor to find.
My advice; do not rush