MugiPocketNews
Whether a sealed box is a good buy depends on one comparison: the price of the box against the value of what is inside it, weighted by how often each thing appears. You do not need the exact pull rates to make the comparison useful. You need the chase card prices, which update daily, and a rough sense of how rare the top tier is.
The OP17 example
The set's chase cards today: Rocks.D.Xebec [Super Alternate Art] at $8,182, Monkey.D.Luffy [Super Alternate Art] at $1,735, Shanks [Manga] at $1,571, Edward.Newgate [Manga] at $1,200, Kaido [Manga] at $1,011. The Xebec Super Alternate Art alone is worth several boxes. The manga prints are each worth roughly a box. Everything below that is worth less than the packs it came in.
Your vault updates with daily prices; Mugi Vision checks a card in seconds.
Three rules for sealed
- Buy sets whose chase cards are rising, not falling. If the top five printings of a set are down over 30 days, the box is worth less than it was and will be worth less again next month.
- Value a box at its second best pull, not its best. The top card is rare enough that most boxes will not contain it; the manga tier is what a box realistically pays out.
- Out of print beats in print, every time. A sealed box of a set that is no longer produced has a supply that only shrinks. That is the only sealed product that reliably appreciates.
A sealed box is only a good investment when the cards inside it are one too.
Chase card prices as of 20 September 2026, updated daily on each card's page.