May be targeted. Not a bad deal if you are looking to sell and upgrade your phone. Email also says "Pay no selling fees", but can't see anything about final value fees being waived in the terms and conditions.
T&Cs:
Simply sell your mobile phones or video game consoles for $20 or more to receive a coupon worth 10% of the final sale, up to a maximum of $50 per coupon. The offer ends on 24 Nov. *Valid on up to 10 listings. By clicking Accept Offer you agree to the terms and conditions and to receive further communications about the promotion. T&Cs apply.
Edit: Final Value Fee Still Applies. Discussion.
Op, add a link to the T&C's