I buy Stubbs from Lowes and stock up when they're on sale. I picked up a dozen bags back in March when they were running the 2 for the price of one sale ($4.25/15 lb bag). The last sale they ran in mid July at $5 per bag wasn't bad either.
Keep your eyes open as they tend to run these sales at odd times (as opposed to during major holidays)
....UDS....Mini-WSM....Midi-WSM....Mod-ECB....22.5-OTG....34"wood fired pizza oven....