I have a pair of AR-10 Pi speakers which I don't use any longer and want to sell. My father bought them together with a Kenwood stereo sometimes back in 1979. Are the speakers worth anything?

The problem is, which I think is quite common after browsing the Internet for information, that the outer foam of the membrane on the subwoofers are drying out and starts to fall apart. I don't have the time and/or knowledge to fix them so...

Besides the subwoofer problem, I reckon that the speakers are quite nice since they are built in dark oak (I guess) and with 3-way switches for adjusting the subwoofer/midrange/highrange.

Anyone out there who could give me a hint on a possible value for the pair of speakers? I guess that there are collectors out there but I will probably not find one in my city (:

Regards,
Rally