How to close a dispenser?

You wanna change sale price of a Stamp? You can't directly change it, you have to close the dispenser first then open a new.

To close a dispenser, you first have to click on the X next to Open, then a window opens.

Simply click on ESTIMATE then BROADCAST and have to wait a 6 blocks delay for the transaction to be confirmed.

The stamp will return to the current address where you hold your stamps.