You’re not a lawyer I’d use.

If the unordered item was an incorrect fulfillment of an order the customer did place, you are legally required to send the correct item or refund the customer's money in full -- including shipping costs. You can ask the customer to return the item, but he has no legal obligation to do so. If, however, you have a contract with the buyer requiring him to return incorrect shipments -- such as the sort of contract you might have with a long-term purchaser -- this contract trumps the law.

Occasionally, a retailer sends a package to the wrong person or sends someone else's merchandise to a previous customer. If the customer didn't order anything from your business, you have no obligation to provide the customer with any additional merchandise or incentives. The customer, however, is legally entitled to keep the merchandise -- though you can request that the customer return it.

Additionally, OP did not solicit the extra PS5s. According to his post, he did not place an order at any time for 3 PS5s. GameStop sent him merchandise he did not order and he is not required to give them the merchandise back.

Unless GameStop has some specific clause about this kind of situation and pursues it, OP has done nothing wrong and now has 3 PS5s.

Source: Was sent an extra “grab bag” by Busse Knives a few years ago. The value was claimed to be close to a $1000. They tried to pursue legal action and paid for my