It will affect how much to sell 2nd hand for those who bought at $99. If sell with warranty, need receipt mah. So can't sell at $99 as it is used. Prolly worth $60-70 at most.
I want to buy 1, so if anyone bought and dont like the lens, pls pm me hor. I offer $70.
I doubt anyone will sell you for $70, must as well keep till warranty expire and sell $100.

Anyway, canon warranty dont need receipt one. just warranty card will do. No warranty card also nevermind, they can check from the system.