Wealthy Elven Bards and the Bow of Infinite Money

[tanksoldier]

So what's stopping an elven bard from buying an Elven Shortbow at $765 and then selling it at the shop next door for $850?

...because the Elven Shortbow isn't available at the shop next door, it's bought from the elves deep in the forest or wherever.

If they character wants to become an elven equipment importer, great.