Possibly even more importantly - how are you going to provide proof of ownership if some person in authority (e.g., Police) asks you where you got said item, when they're on an investigation, looking for stolen property? (and cameras and lenses are one of the most frequently stolen items).
I can't wait for the next instalment in this story - when you find the lenses are Chinese knock-offs of a top brand, and they come with a doorway warranty.
