ProfessorDetective
Explorer
My thought is that, at worst, this is going to provide a lot of content that can be repurposed. It wouldn't have occurred to me to have something so glaringly gamist as a vending machine full of adventuring gear, but I can easily think of situations where that would fit in fine, when I'm not trying to have a more "realistic" game world.
I mean, if magic WAS a common thing in a Modern-Day-Earth-like setting, they would totally be putting mystic meal-replacement drinks (that also heal minor wounds) in the Coke machines. Or some lobby somewhere suppressing them into oblivion because leaving people starving is more profitable, somehow.
Anything more than that, though, like selling weapons/traps/rarer potions or actually BUYING your loot, I would make the purview of actual merchants. I could MAYBE see, like, crossbow bolts, rope, or holy water: small, common, consumable. I'm trying to blend the whimsical into the mundane here, not adapt Borderlands to the table (they already did that). Which I presume is what you meant by being "gamist".