Found a brand new "shure beta 87" dual wireless system in one of the cabinets. Its brand new in a silver metal briefcase. There is an extra briefcase too. Contents are two mics, receiver, charger, antennas, clips, and manual. I am not into pro audio but high end audio is my old hobby. I dont know how much these are worth or the best place to sell it. Can use some help from someone with more knowledge than I have on this!! Thanks in advance.