Still, this really is a moot point. The rules give the baseline and assume the maximum, but page 135 makes it pretty clear there is a range of prices, which likely apply to the other pricing charts in the book.
Plus, there's this tidbit from the aforementioned page:
If your campaign allows for trade in magic items, rarity can also help you set prices for them. As the DM, you determine the value of an individual magic item based on its rarity. Suggested values are provided in the Magic Item Rarity table. The value of a consumable item, such as a potion or scroll, is typically half the value of a permanent item of the same rarity.
Emphasis added. So a potion would really be 2,500 - 25,000 depending on the level of magic in your campaign.