For what it's worth I buy a few spares from Sam's weekly in the summer...between 45-48 racks. Their quality is the best I've seen...better than the ones they sell at Walmart. Their pricing is also very hard to beat....was $1.84/lb yesterday (plus or minus $.02 I can't remember). It seems the price changes on Wednesday morning and doesn't move for a week..
Proud owner of 4 VERY ugly drum smokers....and a Greasy Hill reverse flow....