I am new to this forum and just like that,I have a chance to buy some C40'S.The fellow I am thinking of buying them from wants my Klipsch Fortes,Bose 901 Series 6 and 1500.00 cash to boot.They are pretty much mint condition.I have tried to find info and value of these speakers ,but can find out very little.I am curious as to what drivers tweeters crossovers etc. to look for.Am I paying too much.will try and post pics.