Sigma 16mm f1.4 Lens in Telegraph Cove, British Columbia for sale

I am switching over to a different camera and need to sell some of my lenses to do so. As a result, this magnificent lens is up for sale! I have only owned this lens for about a month and a half. It is a fantastic wide angle yet fast (low aperture) lens. I wish I didn't have to sell it and I am certain I will be picking another one up in the future when the budget can handle it.
Here is my reasoning for the pricing:
You could get this lens new off of Amazon for $650 + tax which will come out to somewhere around $725 final price. Here is the lens on Amazon: https://www.amazon.ca/Sigma-16mm-DC-DN-Contemporary/dp/B077BWD2BB/ref=sr_1_1?s=electronics&ie=UTF8&qid=1519599078&sr=1-1&keywords=sigma+16mm+f1.4
So you will be saving over $100 buying this lens from me instead of off of Amazon. I think this is a fair discount for a lens that is in pristine condition and only 1.5 months old.
Call or text over emailing please.