I sell on Etsy, and I also buy from the other sellers there. If you are concerned about purchasing from a particular buyer, take a look at their Feedback. If it's laden with negatives, that would be cause for concern. Otherwise, you should be just fine.
I would imagine that a successful Etsy seller from Latvia would have mostly international shipments, and should be well experienced about how to handle your purchase. Etsy sellers are usually really great at communciating with their buyers, so send her a "convo" (Etsy's email system) if you have any questions or concerns before you place your order.
Good luck! (and thanks for supporting Etsy sellers and buying handmade!)