Does anyone have any experience with purchasing a factory refurbished Garmin? I am looking at a Zumo 665 and can save about $150 off the MSRP of $799 by going with a factory refurb unit. Supposedly they are the same as "new" as far as the what you get and the warranty but discounted for the loop back through support.... Garmin then allows them to be sold through "specific" dealers supposedly...