Factory Nissan extended warranty costs
I bought my Murano used from Northbay Nissan in Petaluma with 20,005 miles. The dealership charged me $2,000 for a 5 year, 100,000 mile warranty - but the Nissan warranty basically states that if you don't use it at all, at the end of the coverage period, you can get a refund on the purchase price of the warranty. So basically if I don't use it by November 11, 2010 or 100,00 miles (whichever comes first) I get my money back. Good enough for me!
That seems like a very good price for a 2005 SL AWD with Sunroof and Leather. I paid just under $28K for a 2004 SL AWD with everything including nav, XM satellite, tow hitch, leather, heated seats, memory seats, moonroof, chrome wheels, yada, yada, yada. I wouldn't sweat it... that car is still under factory warranty. I think you can get the extended warranty at a Nissan dealership as long as you're under factory warranty when you opt for it. (I *think* that's what I heard...)
Bob