For secure payment processing or banking authorization, you do not "buy" these in a traditional store but rather "order" or "provision" them: Manage your SecurID® token in Online Banking - Westpac
In many regions, "buying a token" refers to purchasing prepaid power credits for a meter: where to buy pay token
For tokens not listed on major exchanges, you can use a Binance Web3 Wallet or Trust Wallet to swap existing crypto for the desired token via a decentralized exchange. 2. Purchasing Prepaid Electricity Tokens For secure payment processing or banking authorization, you