How do you sell thousand trails membership?

type in i do want my member ship

In the club penguin menu their is toys,fun stuff and some other stuff and their will be Membership click on it and then you have to fill in a form and put your credit card number and name and all...

go on poptropica, go to the bottom of the screen, and click on the thing that says membership.

If you buy a card I'm pretty sure you can sell it until you scratch the code on the back, then it's yours only

go to www.weeatkidneys.org if it tastes ok the may pay up to 30,000yen