EBGames Canada has the Xbox 360 4GB Console on sale for $129.99. You can order online and get it shipped for free!
I just went through checkout to check out the shipping costs, and you get free shipping - so certainly the best deal out there. Now other sites have the console on sale as well, most notably Amazon Canada, which has it priced at $134.99. However, EBGames is $5 cheaper than Amazon.
I also checked out BestBuy and Future Shop which matched EBGame's price, but they were both SOLD OUT!
I think that this deal will sell out quickly as well, so if you want a nice XBOX console for a good price, check it out.