Tomestone Gear Exchange for mispurchases.

[aesteval]

Everything ask you something like "Are your sure your wanna buy _____?" and you press yes or no

Not the warning being referred to.

[wereotter]

As long as the gear isn't bound to the character, then I see no need to restrict it at all. If it's not bound to you, it's obvious you've never used it, so it could be something you mispurchase and want to return immediately, or could be something you bought months ago, took a break, and came back and want to change jobs.