I haven't looked at all-grain kits very much recently, but I stumbled upon northern brewer's all-grain kits today and they have a lot of kits in the $15-$20 range including yeast. There are even a couple kits that include liquid yeast for under $20.
I know lots of recipes can be cheaper when you buy in bulk, but I'm still trying to find multiple beers that I always want to have on tap and this is a cheap way to try out lots of different beers.
Just thought I'd give a heads up to everyone.
On tap: BCB Porter, $12 Cream ale, Amarillo Pale Ale, Simcoe Pale Ale
Kegged: Amarillo Pale Ale, Simcoe Pale Ale, $12 Cream ale
Primary: Calypso Pale Ale (x2)
On Deck: Lake Walk Pale Ale, BCB IPA