The problem is way bigger than most think, mainly because most sellers do not take the time to read. New requirements for sellers to update all their listings to conform with the new 'catalog listing requirement' is beginning. We've been feeling its effects for awhile now as they've been getting it up and running. With questions like, "what's going on with eBay?" and, "what's happening to my sales?" and, "is anyone else experience a shut down of sales lately?" All the same questions wondering why they are experiencing a loss of business. This new 'product-based shopping experience' for the buyers, will have a profound affect on the sellers. For some, like the big business type stores, this will be great. For the smaller stores and those with unusual items it may be different. For the sellers of vintage, used, antique and one of a kind, it may pretty much be over, or at the least, a stand still for some time. This new policy that takes affect in May is directly to benefit the 'new' item stores. If your items are not found in the new eBay catalog, your items will not be viewed, plain and simple. Of course eBay says they will eventually get those type items added into the catalog, but that these changes are going to take a lot of time and most likely, money. I think we all know what that means.
I urge all sellers to take the time to go to the 'Seller Center' and read every question they have given answers for and don't forget to read the answer too. It will open your eyes as to why you have not had any sales and why you may not have any for a long time. If you have not updated your listings to be in the new product-based catalog for eBay's new 'product based shopping experience', then you are going to miss out. This is important so take the time and read the updates taking place before it is too late. Some of you may want to just close shop and others will want to get busy fixing all their listings to be able to stay in business. Go! Read! Do it now! 
Hope I didn't scare you. I just wanted to get your attention. This is important. Below is one copied question & answer of the many eBay has supplied, as an example of what you will find there:
Will the catalog listing requirement expand to vintage, unique, or one of a kind items at a later time?
Yes. We will enable all sellers to add their products to the eBay catalog directly, including unique, handmade, and vintage items. Associating these items with the catalog will ensure that they are discoverable in the new product-based shopping experiences. Adding a unique product to the eBay catalog will require a similar time investment as the current listing creation process.
Does that not sound as though these will be last to make it into the catalog, and until they are added these will not be found in 'search'?? These were not the only ones so check it out and I think you will understand why your listings are not being viewed or bought. Go to the 'Sellers Center' and read every question and click on the answers eBay has supplied so you won't be left behind.
