I haven't tried them but fiftypoundsack.com is said to have good prices. I haven't heard much about them lately so check 'em out first.
When you add shipping I can not beat my LHBS's. The best route, if you can get involved, is to join a group buy. I haven't been able to be available for deliveries so I haven't done one yet.
Sounds like a website I would not want to go to haha but I'll check it out.
I know northern brewer has 50 lb. bags for $35 but the shipping is $20 which is way too high
Check with your LHBS. They may order with their regular shipment and their freight cost may make them the cheapest by the time all costs are calculated.
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