you wont be starting with any of the top tier 1-4 * monsters (who can be summoned without any general restrictions) like many of the Duelists will, putting you on the backfoot from the start, and theres no indication as to which boosters contain what cards (outside of its signature card, i.e Dark Magician or Red-Eyes Black Dragon) which could help with building towards a particular deck
EDIT IV: Reworded the effec once more to try and balance it and have it work properly
Since these cards are often faked, it's safest to buy a graded copy anyway, which is much easier to appraise than a raw copy
Its Holo Rare V rarity drives most of the premium over the set's regular cards
8 Island 8 Mountain 8 Swamp Abaddon the Despoiler Aspiring Champion Assault Suit Barren Moor Be'lakor, the Dark Master Bile Blight Bituminous Blast Blasphemous Act Blight Grenade Blood for the Blood God
This means its absolutely perfect, scoring 10 for centering, corners, edges and the surface