There are plenty of items no longer available in the store which I have been interested in purchasing. Unfortunately many of the releases are limited, which is understandable to drive desire to make a purchase. Maybe it would be possible to re-release items a few times a year as part of an event (even if they cost more than when they were first released or full price again).
It would make for a nice touch on the upcoming 1 year anniversary of release that you could make all prior skins available again for a short time with a big in-game store sale of some kind. It would be good for players to have access to these skins again and hopefully drive some business for you as well.
Thanks for your time.