I cannot tell you how many times I've had this conversation:

Customer: You can't get [thing a] anymore, it's all the cheap crappy [thing b] now! All I want is [thing a]! I can't find it anywhere! I've been searching high and low for [thing a] but it just doesn't exist anymore because everyone's selling this awful flimsy foreign [thing b].
Me: We sell mostly [thing a] they're this whole wall, we do stock just one version of [thing b] because it's half the price
Customer: *grumbles a bit then buys thing b*