The amount of them I offer heavily depends on what kind of super rare you offer me in exchange. The number of Ore Busters I have is likely what you are inquiring about, but I am not sure if I am going to publicly announce that.
Strictly trading only for super rare items, and even then it would depend on the super rare item that was being offered... The idea is that I am able to offer one (or more) Ore Busters for a super rare item, with or without rupees on my side of the deal also, for items that are very hard to obtain so that I can get more items for my museum.
Sure thing, feel free to quote me again here or simply PM me when ever you like about it, assuming it is still on the list!