[sdiy] voltage controlled filter???

[Senso]

>Find it very intersting on Ebay people paid some pretty good money for CA3080,
>while there are all these ICs available some are as cheap as 50c but some cost
>$50USD!!!!!!!
>
>Thoughts?

Can't help myself, but now I finally have to ask...
I've been reading over and over again, in many places, about the high 
cost (what's "high"?) and unavailability of the CA3080. Do you people 
know something I don't? Because AFAIK they are quite cheap and easy 
to get.

Senso