You can buy a 8lb container of PBW from Midwest on Amazon ( http://amzn.com/B0064O7XRY
) for $36.99 plus $10.91 shipping which comes out to $5.99/lb. That's the cheapest price I have found yet. I'd ask your LHBS how much a 8lb container would be because you might be able to save on shipping costs if their price is reasonable.
Brewing Soon: Scottish 80/- with Cascade and Willamette Hops Double batch with a "IPA" mode out of half with added hop tea and dry hops.
Bottled:Pumpkin Ale & Mcquaker's Chocolate Oatmeal Stout
Drinking: Above & HUB IPA & Dechutes Black Butte Porter