Please remove the Missing Item notice or take away the Buy button at least. It's not needed and is more of an annoyance and an extra click when you're trying to swap things around and place items quickly. I have now purchased an extra tripod accidently which I do not need but cannot return. If I need anything I will get it from the shop in the normal way.
To be honest, as there are so many great items to purchase and manage now, I feel like the shop and storage system could probably do with a full rework.