I get the 2x2s from my local shop at 100 for $4, but the plastic pages are a lot cheaper on Amazon. I think it costs about $15 for 100 plastic pages, while the shop charges 75 cents apiece. And if you should ever want to sell coins online, you can get shipping envelopes really cheaply on Amazon as well.
Your shop only charges 75c/page???! Jealous over here for the 90c/page over here. Gotta change my dealer...
I have bought from Brooklyn Gallery & direct from Whitman http://www.brooklyngallery.com/ http://www.whitman.com/