I didn't find any form for feature requests, but maybe someone will see it here.
Dear Etsy team, please, add a possibility to filter search results by the shipment cost (or by the total cost of the listing+shipment). I am ok with a non-Free Shipment, but I'm not ok with a shipment cost of 15 euros for an item that costs 17 euros. As a result, I have to spend half an hour filtering out the search results that seemed to be within my budget but turned out to be too expensive to ship, and then I just give up and go for a supply store or Amazon where shipment price is fixed and well-known in advance.
I realize that Etsy's main market is in the USA where delivery services work a bit differently than in the rest of the world, but hey, the rest of the world exists too and 'Free Shipment' is definitely not a universal solution.