CMS in the Netherlands currently has an F2 cylinder "on sale" for 600 Euros. Regular price: 2356.00Euros or 3,212.00 US $. The matching new head is 2488.00 EUR or 3,392.0 US $.
A new K (up to K6) head from them goes for € 1590.00.
I would consider $ 1,000 for a new head as an okay price for those who have the change in their pockets. A few years ago, I bought a NOS head on eBay for about $ 500. But it is a K7/F1 head which goes for less--but currently seems to be even harder to get.