I have a used msd sci #6300 unit for sale. I bought this unit used from a member on nico about 6 months ago but i never installed it. It does have some surface scratches, but nothing to be worried about. Also, it seems that all/most of the wires have been shortened, which should not be a problem to lengthen. I'm lookin for about $70 shipped obo. You can email me at bassman31386@aol.com to ask questions or to request pics. I do accept paypal at the same address. thanks