Unless listed as special order, items are regularly stocked. No one has everything all the time but we chose our sources in part based on level of supply. If we’re caught short, we probably already have the item on the way. We order and receive from our major suppliers every week. Anything more than that, we’ll let you know.
We do maintain a shallow supply on many items for a very good reason: prices are updated as often as monthly and often they go down! And sometimes dramatically. Operating in an environment so defined, it would be folly to stock up too much.