When I go into the CW part of the cash shop at the top it shows me a list of the items that are on my wishlist. I was in there earlier and bought an item and I just went back to buy another item but it seems to be gone now.

Is there a way to know when an item will disappear from the CW shop so I don't miss out? Like, is there a time limit or a quantity limit on things?

this totally depends on how the item is placed in the shop, and this is based on what the CW creator has chosen. I don't think that Subeta itself marks any of the items in the CS by how they are there.

You can find out the maker of the item either by Googling 's new CW list, or by doing URL tricks, or by asking around in the Human Avatar forum.

If an item is there for a limited amount of time, or has a limited amount of copies available, it will say under the item. I don't know for sure that it will say on the WL section though because I haven't used it. However, you can take an item out of the cash shop at any time so if the creator suddenly decides to remove it, there's no way to know ahead of time. If you could find their selling board, that might give you some information in that case. [edit] I tested it out with items currently in the shop, and yes it does show under the item in the WL section