Hello,
Used this scam a couple times to get a few epic mounts on my account. It would be best if you did this using two accounts, your main account and a hacked/scammed account you don't care about. Get on your scammed account, make a character (something other than a human warrior!), and post "WTS [Big Battle Bear], PST with price".
As with all scams, you'll get a few who will call you a scammer and such. But eventually you'll get a legitimate buyer. It is natural that they will have fears about purchasing it. When the moment seems right, mention that you work for Upper Deck Entertainment and you have a buddy in printing who got you a few cards. If they don't believe you, which 90% of the time they wont, offer to send them an e-mail from your Upper Deck Employee e-mail account.
This is where you have to be creative. Go to EvilPage and in the "FROM" box, insert [email protected]. Insert their e-mail in the "TO" box. Put a random, appropriate title in the "SUBJECT", and put some fitting text in the "CONTENT" field.
Send the e-mail, and tell the person your scamming that you sent it. They will check, see it, and hopefully won't try and respond. You might get unlucky and find someone who can spot a spoofed e-mail from a mile away. If not, most of the time they will feel more comfortable trading and will give atleast half, if not all the gold upfront.
Hope this helps! If you have any questions, please let me know.