Chapters Indigo has The Walking Dead Compendium Volume 1 & 2 both on sale for $31.47 right now. This is a good price if you are looking to get into the series as they usual run about $39 on sale normally.
You can also use the coupon code for $5 off a purchase of $30 or more to bring the price down even further. Simply enter the coupon code MARCH2013 at checkout.
Chapters Indigo also offers free shipping on orders of $25 or more.
The first compendium covers issues #1-48 and the second compendium covers issues #49-96.
Click here for The Walking Dead Compendium Volume 1
Click here for The Walking Dead Compendium Volume 2