Up for sale is the tricky Ben-Ben, Akki Hermit, a rare card from the Champions of Kamigawa expansion of Magic: the Gathering. These are the original, black-bordered, English version.
Ben-Ben, Akki Hermit: 1/1 Red Legendary Creature (Goblin Shaman); tap Ben-Ben, Akki Hermit to have it deal damage to target attacking Creature equal to the number of untapped Mountains you control; casting cost 2RR.
These cards are all in at least Very Fine condition, with most being in unplayed, Mint/Near Mint condition.