But there 2 cases is 24 packs which isnt that many, not to mention not everyone can get costco memberships.A fair amount will vary, maybe 5 packets. But taking 2 cases is taking the piss, unless you are collecting for the foodbank. If you want to buy in bulk like that, go to costco, don't wipe out the stock at your local supermarket.
For me a fair amount would depend on how long it'll last you. Like for example I buy 4 crates of drink at a time but they only last til the next shop, wheras someone else might buy 4 but it'd last a year.
So who has the fair amount, me who drinks more & will buy more in that year. Or the person who's drinks are sat in the house all year waiting to be drunk?