As a professional buyer, my advice would be to go for the 12 pack but only if you are sure you'll turn over your stock in good time and not be stuck with any waste/unusable products. Alternatively go get salt and shake instead as they are more fun.... Or..... Even better...... Pickled Onion Monster Munch.
Never eaten crisps. Look like fresh air fried with sand and gravel. However, Doritos with a salsa dip, now your talking.