I've never thought BRP Boxshop was a good deal, whether buying 10 at a time or by the case. I pay way less for boxes from Amazon (no tax, free shipping), Dawn, BakeMark, and even Restaurant Depot.
Howsweet, you cray cray. $17 for a 22" drum? Plywood is cheaper than that. Do you have an account with Dawn or BakeMark? Dawn is by Ikea and BakeMark is in Pearland, not far off of 288.