Originally Posted by Mike Cash 
I just auctioned mine. Needed the money and I practically never used the thing. I started it out at about $30, which is what I paid for it. You could have knocked me over with a feather when it fetched $75! Probably helped that I sold it in Japan and, as best I can tell, the lens was never sold here in the home market. They're very rare here.
This lens sometimes goes for more than it's worth because I suspect there are many"not so knowledgeable" photographers out there who haven't done their homework & don't realize that the Takumar version is inferior to & cheaper than the SMC version. Consequently, they think they've stumbled onto a good deal.