I guess I should have qualified my question a little better.

I am mainly looking at the +- 1900's vintage brass large format lenses.
I think a Dallmeyer 3b just sold for $1600 on ebay.

Perhaps that was a rare lens but petzvals and similar lenses seem to gain a premium.
I know that swirly bokeh type prints are increasing in popularity but at the prices these go for I cant help but think that people are snatching them up for collections.

I mean if you buy a soft focus lens to use, how many do you need? Theres only so many uses for these.