The 3 free auto relists is only available to casual sellers

When you list an item, you can easily set your listing to relist automatically up to three times for free if the item doesn't sell. This feature is available to non-business sellers (sellers with up to 100 transactions and less than $12,000 in sales in a 12-month period).

http://pages.ebay.com.au/help/sell/relist.html