Re-swap postcards

Do you have some duplicate cards in your collection? Do you have cards that just don’t go with your collection? Let’s re-swap them. You will send your partner 3 postcards that you got from someone else. The cards should be previously written, stamped and sent through the mail. You will now send those 3 cards of your choice from your collection in an envelope to your partner.
Just to be clear - you are sending 3 USED postcards to your partner.