Follow these simple steps –
1. Login to www.trademe.co.nz, (register if you don't already have a Trade Me account) and on the Sell > list an item page on Trade Me, complete the required fields as usual.
2. On the check details page on Trade Me, select Plunket. Doing this denotes your listing as “This seller supports Plunket”. If the item sells, your success fee will be rounded up to the nearest dollar and the difference donated to Plunket.
3. Click on “start my auction” and good luck!