Pick up an OtterBox Defender Series Case for iPhone 5 in black for only $18.15 (originally $59.80). This product is sold by Noahs Chateau of Deals, but Fulfilled by Amazon, so you can still get free shipping on orders of $25 with this product.
The Source has the exact same case priced at $59.99 (plus shipping) and the cheapest I could find any Otterbox Defender in Canada was around $42, so nowhere near this deal via Amazon Canada.
Now, why do you want an Otterbox? Just think of how expensive your phone is. Then, think of what would happen if your unprotected phone accidentally fell, was dropped, was gently nudged off the edge of a table, or had a run-in with the pavement when you tripped and fell. Think of how expensive a replacement would be… got that? That is why you want to spend a measly $18.15 to protect your $500+ device. Huh, I think I just convinced myself to buy one.