Hello, I met someone who has a set of M&K speakers for sale, so now I'm negotiating a price with him. The set consits of : 4 x K7, 2 x K4, 1 x K9 subwoofer. They seem in pretty good shape, and they sound fantastic (although I'm not too sure about the sub). What would be a fair price for a used set like this? Right now we're between £1050 - £1200. Thanks, CJ PS : My amp is a Pioneer VSX-AX5i. I heard them (briefly) on a Yamaha amp, but I'm a bit worried about how they'll sound on the Pioneer. Anyone here that has a Pioneer with some M&K's? Do they combine well?