I think they mean on the other side: using the Costco prices to go over and get the printer for even cheaper at BestBuy. Edit: I was just thinking a little mor

I think they mean on the other side: using the Costco prices to go over and get the printer for even cheaper at BestBuy. Edit: I was just thinking a little more about this and wondering "wait, why would they want to stop people from doing that?" Best hypothesis: you see the Costco price and you know that it's going to be the best price you're going to find on that; there's no reason to shop around, if you want it you just go to Costco and get it.