May I present you one of these options where to get your circle lenses with affordable price, fobbybarbie.com. They are offering you worldwide shipping and all info about shipping and product returns are explained well at ''shipping info''. If you are that kind of shopper who is struggling with way too many circle lens options I recommend this one.
When you open lens details it says does it come with free shipping. For example in this pic you see (FREE SHIPPING + LENS CASE). Their shipping to Finland takes 3 weeks normally. Lenses are available with powers and without! There's many different kind of lenses available with pictures so you can see how those would really look like.
About payment I recommend to use paypal which is one of the payment options that they have :) really simple and quick and safe! If you have some questions about the lenses don't hesitate to contact them.