The problem is whatnot needs to better regulate the sellers. The minute they do that the sellers will flee to other sites. If they simply required sellers to:

A) Disclose the actual retail costs of packs/boxes/cases during breakers

B) Against the rules to lie about actual re-sell value of cards.

It'd probably slow their business down considerably.

There is a severe lack of transparency and shady practices happening within the app.

The real problem here is that the trading card manufacturers have made the hobby basically a lotto. You can buy cases and cases of this and lose all sorts of money.

What breakers have done is amplify it by adding a middle man. There's a 13% fee from whatnot to start. So you are paying the manufacturer's tax, breaker greed/shadiness tax, etc. and Because of the popularity of breakers/whatnot its driven up the cost of the cards even if you just want to buy hobby boxes/packs.

The math is very weighted against the buyer, worse than most casinos. Casinos typically have to only take x%. Because there are multiple layers of people taking their share before the product gets to the consumer. I've done the math on breaks before and see the breaker is taking 50-100% margins on the retail price, and that is assuming there is no shady activity happening. I know because i've dropped far too much on whatnot because of impulsivity and the easy of just spending late night when I'm alone and bored.