A human, down on his luck, stumbles across a mysterious being running an unbelievable store.

Believing he just made the purchase of a lifetime, his good mood is vanquished when he is hurled across time and space to the world of Equus. It may not have been his original plan, but he is determined not to let that stop him. He will rise up to become the greatest conqueror this, or any other world, has ever seen.

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Yes this is a displaced fic, or Isekai if you like anime terms. But with a beginning inspired by a set of commercials, rather than the usual guy goes to con drivel that's been done to death.