My Almighty Convenience Store in the Apocalypse

The idea of transmigrating into a new fantasy world is romantic, but when by a whim of fate, you are sent to a world on the verge of collapse, where zombies have conquered almost the entire planet and humans struggle to survive, you can only regret your bad luck. 
Sam Moreels, who was almost eaten several times, finally got some luck, he got a cheat system... but a pretty picky one. 
- Ding! Announcement Mission [First Gold Cube] - Mission Introduction: Sell a pill and earn the first commission! 
Level-1 Strength Enhancing Pill: 1000 spiritual coins. 
Level-1 Blood Replenishing Pill: 1000 spiritual coins. 
Level-1 Godly Speed ​​Pill: 1000 spiritual coins.
Level 1 Energizing Pill: 1000 spiritual coins.
In a corroded world where spiritual coins were a luxury, where you had to risk your life to get them... who would be willing to pay such a price for a pill?