You can go to shoppers drug mart and buy Vanilla prepaid mastercard or Vanilla prepaid Visas, that's all i use to shop online. I never ever use my real CC.
$200 and i think they might have $250
edit: You cant use these cards to verify a paypal account but paypal will accept them to pay for stuff. I use them all the time and have never ever had anyone ONLINE decline them. but if you make a purchase from an american retailer, the exchange rate will make it auto-hold and u have to call them, but they will release it no problem.