Auctions can only be edited if no bids have been placed. Classifieds can be edited within the first seven days.

You can edit your listings through the Items I'm selling page (available from your My Trade Me page.) Click the 'Edit' button next to the listing and make your changes. If you just want to change the start, reserve or Buy Now price then you can click the 'Edit pricing' button.

If there are bids but the reserve price hasn't been met, you can lower the reserve price to within 1 cent of the current bid.