hello. Someone said you have an SRX MK3 for sale. I have an old set with an SRD7 energizer, one channel of which is out. I liked them very much. Are yours still available for $200? Someone else is selling a defective pair for $150, clearly not as good a deal, although I could probably swap out on channel of his to make a good set. Do you have others also, like Lambda's or 404's, for sale?