Sales are dismal here too. I've been trading on eBay for over 10 years and have over 10,000 positive feedbacks. Since the "spring release" my sales are down by at least 30%, and vary greatly from week to week, where as previously my sales were consistently strong. My listings are simply not getting "seen" as much any more, which has lead to less sales.

I can only reiterate what others have said in regards to diversifying. Try adding to your product range if you can, and definitely do not rely on eBay alone to make sales. As I make my own products I can sell on other popular platforms for makers. For the first time ever this week I made more sales on one of these other platforms than I did on eBay.  Due to declining and inconsistent level of sales, I no longer see eBay as the main focus of my business and are taking active steps to shift my business elsewhere. Best to start now before things get worse!!