i got a dlink n router about a year and a half ago at Best Buy for $54. No issues with it at all. I use my laptop in my backyard regularly, and the router is located in the basement office.
Should be easy to find these on sale eg:
Netgear Wireless N Router (WNR1000-200PAS) - Best Buy Canada
Or:
D-Link RangeBooster Wireless N Router (DIR-628) - Best Buy Canada