I have a CA$50 Williams-Sonoma gift card that I'll sell for 3 bitcoins, if anyone's interested (think Father's Day).
The card is only valid in Canada.
I'll mail it to you once I've received the bitcoins.
You can verify the balance on the card by calling 1-800-846-9817 and punching in the card number (6048 7457 8289 4867).
Now, this is the first thing I'm selling on this forum, so you have no reason to trust me. I do want to build a reputation as a trustworthy bitcoiner. So I promise to send it to you. Or, if you have an established reputation, I'll send it to you and then you can give me the bitcoins once you've received it.
My bitcoin address: 1QH1zQGcW4ABJQtWbE38ZnpXGGYV8SLUJy