At the $300 pricepoint, you're gonna have to buy used from ebay or Craigslist. You could possibly buy new from Schwinn Signature, or Jamis bicycle shops. Perhaps even Nashbar.com, or Bikesdirect.com, will have a deal or two!
www.bikesdirect.com/products/gt/gt_aggressor_1.htm
The GT Aggressor @ $300
www.nashbar.com/bikes/Product_10053_10052_529188_-1_203131_10000_202383
The Mongoose Crossway 125 @ $180
www.schwinnbikes.com/bikes/mountain/2012-frontier-mens-14351
The Frontier Mens @ $330
www.jamisbikes.com/usa/thebikes/hardtails/trailx/12_trailxr_bk.html
The Trail X @ $330
- Slim
PS.
You would have to either go thru
www.myus.com , or pick it up at a US destination, because bikesdirect.com does not deliver directly to Canada.
Nashbar ships to Canada at your cost.
* Buying a used chromoly steel 10 speed bicycle from a local source would be a great alternative here! 