I have a Speed which is calibrated for my Kodak Aero-Ektar 178/2.5, for doing portraits. I paid $400 for the Speed & Optar in immaculate condition. I do believe $400 for a Crown is too much. I can sell you a Crown with Optar & Graflok back in great (though not immaculate) condition for $250. Let me know if you're interested.
I also have a Crown, and it's going to be my go-to camera for landscape with my SA 75/5.6 and Nikkor SW 90/8. Until, that is, I get me my Chamonix 45-2