please add a confirm cancel command after you try to /cancel something, for example: "Player: /cancel diamond 10.
VSHOP: Are you sure you want to cancel 10 diamonds? type /cancel confirm to confirm this cancellation. "
it would be good for accidentally canceling a large number of items, especially with the tax you have to pay for putting it back up.
Another VShop feature that could be useful is when you type /stock it could tell you if you are the #1 cheapest, #2 etc so you know if you need to change your prices!
