I checked Bestbuy and Futureshop websites, and I found a couple good deals. The best deal I found was Futureshop, they have a refurbed Lenovo laptop for $299. It's 15.6", i5 processor, 6 GB, and a 750GB HD, and Windows 7. That's probably the best value you're going to find for the money.
The runner-up was a $399 Gateway 15.6" laptop at Best Buy, with i5 processor, 8 GB RAM, 500 GB HD, running Windows 8.
I wouldn't recommend getting a "Chromebook", which doesn't run Windows, a system with a non-Intel Core processor (i3 or better), or with less than 4 GB of RAM. Also, although there are exceptions, many refurbs aren't as good of a deal as you'd expect, as they often have older hardware with lower specs for about the same price as a new.