eBay announced a lucrative coupon today! 15% off, no minimum, maximum discount $100 (so they can purchase up to $667), few restrictions. https://pages.ebay.com/promo/2018/1121/70319.html
BUT it's only good on mobile.
Many sellers absolutely refuse to change their old templates or even read about mobile optimization - especially true amongst those who are shouting about poor sales.
Maybe this will be a wake-up call. Those old-style listings are not going to display right for people trying to use this coupon and may be entirely blocked.
https://pages.ebay.com/sell/itemdescription/mobilefriendlyguidelines.html is just one place to start for anybody who wants to get going.