Steiner Parker synthacon

Recently a Steiner Parker Synthacon went for sale via Reverb.com, price set to € 8.800 and I was curious – would such a synth justify such a price. Original list price (1975) is $1195.

I realised I had never heard the Synthacon. And I found this little demo on youtube. Have a look and listen, what do you think of the filter performance?