Reddit reviews Ultra Pro PRO-Matte Standard Size Deck Protector Sleeves for Magic, Pokemon and Dragon Ball Super - Black (50 ct)
We found 2 Reddit comments about Ultra Pro PRO-Matte Standard Size Deck Protector Sleeves for Magic, Pokemon and Dragon Ball Super - Black (50 ct). Here are the top ones, ranked by their Reddit score.
Glare-free, non-reflective sleeves make our Deck Protectors ideal for use in tournaments or on camera.Eco-Friendly, Acid and PVC free design makes them perfect for collectors.High-quality matte surface for a softer, more comfortable feel and more natural shufflingSleeve sizes are 66 x 91mm allowing them to comfortably fit Pokémon, Magic: the Gathering and other standard size trading cardsEach package contains 50 sleeves
Looks like they're standard size cards (from a quick Google of their sizes), so standard game card sleeves should work fine. The easiest solution would be to go down to your local game store, or even big box store like WalMart, and pick up a pack of cheap sleeves from the TCG section. I'd suggest a cheap pack of Ultra-Pros or something like that, but there are myriad options out there.
Something like this should work fine for what you want.
Best bet for storing a large lot of cards is cardboard boxes such as those you're seeing online. Anything will do, really. If you're concerned about the long term health of the cards you'll need to keep them in a watertight container in a temperature controlled room.
As for card sleeves, most folks will use one of the following (listed from most to least durable, roughly):