So I get my new "pre-owned" 528i and realize I will need new windshield wipers, but no big deal. I go to my local "Canadian Tire" where every car make is listed for car blades except the BMW 1997 and forward 528 blade. Deep in my heart I know this isn't good news. So I go to another auto parts place and look in their books, same story. Eventually with the help of a clerk, I find the blades at about 4 times the price of ordinary blades. So what is the scope on these blades, are they lined with gold or what?