EOS has launched its own blockchain so it is no longer ETHER based. You'll need to buy from an exchange but it might be worth holding it in the exchange just until new wallets are introduced. EOS is not like other tokens as you need to stake tokens for cpu and bandwidth in order to use the blockchain. This is how EOS doesn't need any transaction fees. Very much like how steem power works on Steemit where we stake our STEEM for voting power.
As EOS is brand new, it's not very user-friendly just yet and it can be quite a learning curve to set up an account. This will change in the coming weeks.