www.dvor.com, www.leftlanesports.com, www.altrec.com, and one of my favorites www.woot.com. These Internet sites usually have you sign up and they email you about once a day for greatly reduced sports and outdoor items that last for only a few days.
www.woot.com they had me hook, line, and sinker with this deal of two sleeping bags for 20 bucks. Now these are not any sort of 0 degree bags but they are 50 degree bags which in the Dallas area works out great for about 6 months. Then I have had an issue with replacing my 25 year old "White Stag" triangular cut 45 degree bag. This bag I have is perfect for everything except cold weather and I have sampled all sorts of bags and nothing is like the stag in the way it feels. I just need a bag to get me through the few cold months. So when these 50 degree bags came up I did a little research and found out that alot of people were using them as a bag liner to add 10 to 20 degrees to your existing bag and at 10 bucks for a sleeping bag liner I was buying away.
www.woot.com is great because anything you buy in one day is 5 bucks shipped to your house so 12.50 bucks per bag and hopefully winter will be good.