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They will end up costing you cards, and losing cards means lost opportunities, which means less chance to win the game
These are the most valuable cards in the set: Lacey (SIR): 13,000 - 15,000 yen ($83 - $96) Terapagos ex (SIR): 8,000 - 9,000 yen ($51 - 57) Briar (SIR): 4,000 - 5,000 yen ($25 - $32) Lacey (UR): 3,000 - 4,000 yen ($19 - $25) Area Zero Underdepths (HR): 3,000 - 3,500 yen ($19 - $22) Hydrapple ex (SIR): 3,000 - 3,500 yen ($19 - $22) Terapagos ex (HR): 2,500 - 3,000 yen ($16 - $19) Bravery Charm (HR): 2,500 - 3,000 yen ($16 - $19) Galvantula ex (SIR): 2,500 - 3,000 yen ($16 - $19) Dachsbun ex (SIR): 2,000 - 4,000 yen ($13 - $25) Briar (UR): 2,000 - 2,500 yen ($13 - $16) Crispin (UR): 1,000 - 2,000 yen ($6 - $13) The least valuable secret rares are Medicham ex, Orthworm ex, and Kofu
Dont have multiple different locations where loose unsorted cards happen to be at that moment
Japanese-language Collector Boosters feature invisible ink cards less often than other languages (approximately 7.8%)