I'd prefer to sell this system as whole, but I am willing to part it out. The PX4 was used briefly. BQC System - $100 35DC - $70 35PX4 - $80 Buy the whole thing for $230 shipped. If interested, shoot me an e-mail. I'm not on the board much because of work/school/getting ready for tour. I will consider working out an even better deal if you have a reverb you'd like to trade. It all depends on what you have.