I can ship these packs for $5/ each or $5 if you want both of them.
I have two dog packs for sale. The Kelty Chuck Wagon is size medium and has been used for one season of hiking. It's in great shape just a little dirty from being rubbed on trees and rolled in the dirt (it was on a dog after all). I would like $30 for it, they are $50 new.
The second pack is a size large REI Adventure Dog Pack and is in nearly new condition. $30 for it as well. Here are some photos of the two packs.
Check REI for product info on both of these packs.