Upwards of £50 in good nick for the UK versions and probably more for the Dutch Fontanas. I've got several of them - I think I picked the Dollar Brand one up for about £7 !
Isn't the Marion Brown cover art taken from a Brownie photo? (I'm sure I remember him mentioning it).
any preference for monos vs stereos in this series ( where they exist in both) ?
I think I prefer the stereos for all of the Fontana pressings (example - some of the Tubby Hayes LPs, I think I have both mono and stereo for '100% Proof' and the stereo wins hands down). With respect to the Marte Rolling sleeve LPs I think only the Dollar Brand of the ones I have is in mono. The rest (Cursons, Mohawk, Russell etc.) are in stereo.