where can I obtain the MLP comics

Hello! This is the first post that I do on this sub, sorry for the bad grammar, english is not my first language.

I wanted to know if the mlp comics are available in any website that you are aware of for free or if there are any places that still sell them.

I live in Spain and I've been looking for them in places that sell used books but I haven't had any luck so it will be very useful if people that have more time in the fandom gave me some orientation about where to look.

Thank you:)