My sell through rates on eBay sales started to drop off in mid September. Business overall was still good so I didn't dig into what was going on but I knew something was up. Near the end of October I decided to take a closer look and found hat the sell through rates on my fixed price 7 day listings had plummeted as shown in the chart below.

The slow down really kicked in the week eBay rolled out fixed price 30 day listings and I converted all my eBay store inventory listings to fixed price 30 day listings. The main reason for this drop appears to be recent changes to eBay search that keep identical fixed price listings from the same seller from showing up in search (as of 10/23 only one listing was being shown per seller other identical listings were being hidden). Because of this there is no longer any point in listing the same fixed price listing multiple times and after this week I will no longer be listing fixed price 7 day listings.
In order to do something to try and create more sales I have been experimenting with listings some of my best sellers in the auction format with buy it now. So far the results have been positive with sell through rates around 40% a week with about 50 items listed a week. However at this point I have pretty much given up on eBay. I will continue to list to get the the sales that still trickle in but all my efforts at growing sales will be focused on my website and Amazon.com.