I know some homebrewers that take good advantage of all grain kit specials, such as offered on Nortern Brewer and MoreBeer from time to time. Sign up for their email alerts.
Especially the 2-fers and 3-fers can be lucrative, as it will qualify you for free shipping. Just stock up on them, buy 6 or more kits.
Buy a mill, and order unmilled, their milling is quadruple crap, while they throw everything milled, together in one bag.
You can then tweak the recipes/ingredients (they can be a bit skimpy on hops, so buy some by the pound (or half pound) from HopsDirect, YVH, etc.), or pull them apart and brew your own recipes.
Me, I like our group buys, where we also split sacks (we're that organized!). I also get my DME (for yeast starters!) by the sack (or split one with a few other buyers) for less than $2.50 a pound.
But our group ordering frequency has been going down the past 3 years, so next time I'll probably buy a few sacks from my LHBS. Their pricing on whole sacks has become rather competitive with the group buy, as those prices went up, and the selection went down. Besides, our LHBS sponsors many of our events, so we all need to support them. And I do, in many ways.
As long as I can get my Simpson Golden Promise (or better), and a few other malt specialty goodies (e.g., malted oats) I won't complain. Even if I need to spend another $10-20 on a sack, it's all worth it.