If you'd like to sell the Ethereum you've bought you can do so on all of the platforms listed above except for PayPal and eToro. PayPal will only allow you to sell Ethereum that was bought through their platform, and eToro is also similar (you can withdraw, but it's a complicated process!). Here are the best options: - Coinmama - CEX.io - Coinbase - Bitpanda For a complete list of Ethereum exchanges where you can buy and also sell Ethereum, visit this page.