plastic sleeves for vaccination cards Large 4X4 Armband Card Holder and more at TekDeals CDC Vaccination Card Protector

Three mana is just too much, and its hard to argue for anything above a D for these

If that doesnt sound too hot and youd rather sell directly to buyers, you can list the cards on online markets like TCGplayer, eBay, or the ChannelFireball marketplace

Apparently, the folks at the Pokemon Company suffer from this too

What sets TCGs apart is that players can trade, buy, or sell cards to improve their decks or collections

Weakness: none Resistance: none Retreat: 1 Tatsugiri Dragon HP70 Basic Pokemon Ability: Attract Customers Once during your turn, if this Pokmon is in the Active Spot, you may look at the top 6 cards of your deck, reveal a Supporter card you find there, and put it into your hand