I've seen $30 CDN ones in Wal-Mart (X-Acto brand), and they actually work fairly decently. Their $60 one is sturdier, but still has its issues.

A guillotine, though, is one of those strange office supplies whose quality raises sharply (heh) for just a few dollars more. Amazon.com has a guillotine I often recommend  for $55 USD (now about $70 CDN, I guess). It's actually a nice balance between cost and function. I cut several hundred pages with the same model a year or so ago, and it had a nice feel and solidness to it, even though it's still medium-weight acrylic instead of wood. It's also self-sharpening (so it'll last for a long while), and it cuts 10 pages at a time with a very clean slice. Unfortunately, Amazon won't ship it to Canada, but you should be able to go to an office supply store with the make and model to order it.

Hope this helps....