ItemFilterType FixedPrice is including StoreInventory items
I am getting all the StoreInventory items included when using ItemFilterType FixedPrice filter. According to APi reference "FixedPrice Retrieve matching fixed price items only. Excludes Store Inventory format items."
At some point in eBay's history, those 2 item types became conflated and thus overlap without any specific differences. At least, that's how I remember that. I think there may have been an effort by eBay to convert them all over to 1 of the 2 types, but maybe that never fully happened. It may be the case that the portion of the docs you are referencing is simply outdated. Unless someone corrects me here in this thread (I'm certainly open to that happening), consider both item types as the same. When I call the Finding API and want to get only fixed-price items back, I request all 3 types: FixedPrice , StoreInventory , AuctionWithBIN .