op6 booster box One Piece Acrylic Case - Premium UV Protected Clear Display Case for TCG One Piece Card Game USA Version | 8mm Thick Walls Strong Magnetic Closure available now! Japanese】One Piece Card Game Wings

Not only do its sellers adjust to market value (which is visible for all), but you can view price history and see seller feedback (its part of eBays network)

You're not just saving your cards from damageyoure elevating them into mini pieces of art

Sceptile-GX is a good card on its own, but it wouldnt be as high up on this list if not for two other cards: its Stage 1, Grovyle, and the regular Sceptile from Celestial Storm

While the Pop Series 5 English variant is also rare and expensive, the Japanese promo Espeon is in a league all its own

Illustration Rares, also known as IRs, are highly prized by collectors and they can be valuable for competitive players, too

For the card to offer value it needs to be recurred a few times which makes it very slow and finds its home most often in control decks or mid range decks that know they will face weenie decks