I hate that whole price thing. If someone wants to sell something they know what they want and if I want to buy something I know what I'll pay. If someone wants what is too much for me I walk away. If it's what I'll pay I buy it. Mostly I trade beer.
I'd offer $1,000 maybe $1,250. I can not afford this kind of stuff and I doubt if I could make it run to it's potential anyway. A well built stock head could out run that one with two carbs so it just a "wow factor" . A race head belongs on a race car. But remember I build and drive junk.
I'd like to have it though. OK, I went back and looked at the pictures. I'd go $2,500 petty quick.