moto master caliper help

Hey i posted this question over on the super moto junkies web site & was wondering if anyone else has any input on it. http://www.supermotojunkie.com/showthread.php?t=28088 Im wondering what a caliper like this sells for,if its a good one, and what would a good used price be on it.If i just buy this caliper from this guy will it work ok with the 320mm rotor i already bought?

Hey i posted this question over on the super moto junkies web site & was wondering if anyone else has any input on it. http://www.supermotojunkie.com/showthread.php?t=28088 Im wondering what a caliper like this sells for,if its a good one, and what would a good used price be on it.If i just buy this caliper from this guy will it work ok with the 320mm rotor i already bought? Thats a very good caliper that should work well with your stock 11mm master cylinder and 320 Moto Master rotor,but a 13mm mc will be an up-grade. I use this caliper with a 13mm Magura radial and I like the progressive strong feel. +++++ http://i44.photobucket.com/albums/f19/launchzone/DSCN0403Medium.jpg http://i44.photobucket.com/albums/f19/launchzone/DSCN0406Medium.jpg

sweet! Now do i HAVE to use the motomater rotor or can i use the other one i just bought (not sure what kind it is yet)?? Yeah ill look into MC's alittle later but im just stumblng across decent deals on some of this stuff so im trying to get it while i can im just running outta money lol.