I think it had to be deconsecrated before it could be sold. I don't think you are allowed to sell consecrated items - (sin of simony.)
That's right -- I remember the tremendous brouhaha when somebody was selling consecrated items on EBay. (Usual dodge - selling the reliquary or container, not the consecrated item). I think some idiot may actually have offered a Host on EBay - although whether it was unconsecrated or not may have been in some doubt . ..