Where can I purchase Tezos?

Could you please elaborate on the various avenues for purchasing Tezos, a leading blockchain platform? I'm particularly interested in understanding the reliability and convenience of different options. Are there any recommended cryptocurrency exchanges that offer Tezos trading pairs with low transaction fees and good liquidity? Additionally, are there any decentralized exchanges or peer-to-peer platforms that allow for the direct purchase of Tezos without the involvement of a third-party intermediary? Your insights would be greatly appreciated as I navigate this process of acquiring Tezos.