Methods and apparatuses for purchasing telephone calling card minutes and for conducting other forms of electronic commerce. In one embodiment, a method for conducting electronic commerce includes providing a kiosk in a publicly accessible location, and displaying one or more transaction options to a user at the kiosk. The method may further include receiving a transaction selection from the user corresponding to one or more of the displayed transaction options, determining an amount due from the user in response to the transaction selection, and receiving funds from the user. In response to receiving the funds, the kiosk may dispense a redeemable voucher to the user, including a redeemable voucher for any amount paid in excess of the amount due.