Agreed - he's a nice guy and all that, but I reckon that the Monk, Grain and Grape and Grumpies all give him a run for his money when it comes to buying in bulk ($100+ orders).
I recently did a spreadsheet of grains, malt, hops and yeast from all of the main players and found that there are some substantial price differences as well as a significant variation in what was available at what store. In some cases, HBS were charging 1Kg prices on 500g bags of specialty grains!!! It certainly pays to shop around - even to buy certain products from certain stores!
The only thing in his favour is that I don't have any freight charges - just petrol from my place in Farrer to his HBS!