With a debit/credit card, you can use PayPal's services without having to sign up for an account. Simply click "checkout with PayPal" and enter your card details.
Only for Singapore citizens. Payment has to be made, with proof sent to firstname.lastname@example.org via email within 24 hours from the issue of the order invoice, or your order will be cancelled.
Unfortunately, no. Once the order has been placed and payment made, no refunds will be given. This is unless you have either been shipped the wrong item or the item has been defaced, both of which hardly ever happens.