Not that I am aware of. Ebay shows the quantity so that buyers know how many are available if they want more than one of the same item. You could list a fewer number, and as some sell, revise your listing to add to the quantity. The most I will usually list of an item at a time is 3. There are a few exceptions though. Most people only buy 1 of a particular EFL team, but I actually had one lady buy 3 of the same team once. If she could not have seen that there were 3 available, I suppose she would not have bought 3. You just never know when someone wants more than one copy of a book, one for themselves and one for a friend, or for a couple of gifts?
nightowls