Partial Buy for Marketplace

[Bun_Vivant]

I honestly don't see many negative consequences to allowing you to buy partial stacks.

When you go to the store for, say, cotton swabs, do you expect them to let you buy just one out of the package of 200?
When they have apples in bags at $3 for 6, but loose at $1 apiece, do you expect they'll let you take an apple out of the bag and buy it for $0.50?

Of course not.

Now why do you think that the case? That is, why do you think bulk discounts are so commonly offered?