Looking for a proxy shopper from japan to italy

Im looking for somebody who can help me, i want to buy some cards from mercari but since i need to buy multiples separated items im looking for someone who can offer a %fee or something reasonable instead of a stock fee for each item i am buying. I need something like that because im not buying very expensive cards and paying a fee for each one makes it basically not worth at all.
Feel free to contact me or comment this post if you think you can help me :)