Unregulated marketplaces may harbor sellers who take payment without delivering credentials or sell the same account to multiple people.
If you choose to proceed despite these risks, the market generally offers three categories: Overwatch 2 account buying guide: avoid common pitfalls
Even if you change the email and password, the original owner can often reclaim the account by providing identity proof to Blizzard Support .
Blizzard monitors IP shifts and unauthorized transfers. If detected, they may issue a permanent ban with no refund for the purchase or any additional money spent on the account.