C Common Echelon of the Fire Kings X TRAP Special Summon 3 FIRE monsters (1 Beast, 1 Beast-Warrior, 1 Winged Beast), 1 each from your hand, Deck, and GY, but their effects are negated, also destroy them during the End Phase
A 1st Edition Base Set holo can be worth thousands to six figures, a Shadowless or Unlimited holo hundreds to thousands, and a common non-holo under a dollar
With a hand of 4 Metalfoes monsters, where one of them is Bismugear and at least one is a low Scale you could Pendulum summon, fuse for Mithrilum and in an optimal scenario end with 2 Fullmetalfoes Fusion + Combination face down
Or maybe whoever made the purchase is just a really big weeb
[1] You can send 1 Spell/Trap from your hand or field to the GY
Draw : Essential to filling your hand, as long as its not the very first player in the very first round youll now draw a card to your hand