Spoiler warning:

Just over $6usd shipped for a small lot of empty Switch cases with cover slips...

Mario Odyssey
Super Smash Bros Ultimate
Animal Crossing New Horizons
Zelda BotW
Pokemon Sword

The first 2 on the list I already have loose carts. Zelda I already own CiB... but I'll keep a lookout for cheap loose carts now for the last 3