EDIT: Stacks with other free listing promos such as 2x Monthly Gumtree listings and "Finish your listing promo" within ebay to leave you an effective 10% profit above the sale price (less PayPal fees).
eBay's new "selling promo". Not as good as $1 Sundays, or 10 free listing promos, but if you are selling, it's better than nothing.
Receive 10% back of your sale price as a voucher up to $50 (sale price $500). Keep in mind you are already paying 10.9% in FVF.
Caveats: The earned reward is a "Voucher" and not a "Gift Card". The voucher will be single-use. The voucher is not usable with any other discount code. Vouchers are valid for 30 days.
*Min sale $1. Max $50 per voucher.
Also check out this Gumtree/eBay promo to avoid paying fees.