Back issues?

Are there any good resources for obtaining back issues online? The store I frequent is pretty good for this but there are a few gaps in my collection that I would like to fill.

www.milehighcomics.com

has loads, but sometimes their prices are pricey.

www.mycomicshop.com is like mile high

www.midtowncomics.com is putting together their back issues online soon

but sometimes their prices are pricey.

the combination of wisdom and the absolutely perfect use of the english language in that phrase will make this thread immortal.......

lol - watch you mouf who you make fun of -- i can ban you!!

seriously -- as opposed to 'their prices are reasonable'