I buy my filter socks from a guy on Ebay. They are high quality and only 4.75 each. Shipping is 6.00 plus 1.50 each additional sock. When we make an order I will see if I can get him down on shipping like 10 socks.
The glue is the best I have found. The tip actually stays clear and works time after time. I buy it locally at Hobby Lobby for $7, but he has it for 5.50.
He also has chucks of Enkamat for Mesh modding skimmer pumps and a few test kits. Prices on test kits aren't so good.
I have dealt with this person before and used the filters socks and enkamat both were a good deal.
Here is his store on Ebay.
http://stores.ebay.com/Specialized-AquaticsI will be getting two filter socks and glue.