I know when you purchase a loose booster you are running the risk it has been weighed or tampered with, but what about blisters? Can you still weigh them to find out if a rare card is inside even though they’ve been plastic vacuum sealed? Or is it safe to buy blisters in confidence?
the more packaging involved the less accurate things can be weighed so with a booster box there are so many factors that it would be almost impossible to weigh
One time myself I sat down with loose boosters and weighed one after the other. Some were heavier than others, but it didn’t change what I pulled. I pulled secret rares in less heavier packs and vice versa. I think this whole weighing thing can sometimes be overstated, but that’s just a n00b’s opinion.
As @mojotbone stated, the more packaging, the harder it is to weigh packs. Pack weighing itself is a proven practice that significantly increases your chances (read: not guaranteed) of pulling a holo or ultra rare from a pack. However, with anything beyond triple blisters, weighing does not work, as the difference between holo and non-holo cards is only a few tenths of a gram. Pack weighing is most accurate with single packs, occasionally accurate with triple blisters, and not accurate with booster boxes.
All this being said, weighing packs in stores (and only buying the heavy ones), or weighing packs and selling the lightweight ones, is scamming. You’re depriving someone of the chance they pay for when they buy a booster pack.
For sure, I’d never do anything like that. I don’t sell boosters anyway, just cards (that are doubles or bulk) I just wondered what everyone’s general opinions were. I’m about to buy a ton of blisters from overseas so I was just wondering how much of a gamble it was.
When I have ordered 3 boxes of product, I have weighed boxes to determine the order in which they are opened. I have had better luck with the medium weight, like a bell curve. So I think weighing of boxes does not help you.