This planter was left in a shed when I purchased my home. I know nothing about it other than I recently had a guest who was very upset that I was actually planting in this "antique", as they called it. Is it really that rare & am I ruining it by still using it as it was intended to be used? It just works so well for my annuals I never thought much about whether or not it was old. It's sort of a creamy white color with a small rough drain hole hidden in the bottom corner, & it has no cracks. How much of it is dirt stain I don't know as it was sort of stuffed up in the rafters of the shed. ?