I agree that they are more exp. to produce, more steel, more fitting, they are the least expensive of the quality single shots.
The Ruger #1 (or #3) is the closest thing to (affordable) traditional British single-shots available today. The OP included a link to a nice Farquharson rifle: so far as cost is concerned, perhaps the OP should take a quick look through Google as to the cost of a Farquharson on the current market... Ruger #1 rifles are cheap by comparison. As to accuracy, I have a factory stock #1 RSI in .270 Winchester that will shoot remarkable 100 yard groups with handloads.
There is a certain ethos in using a single shot falling block. Even trudging through the brush and coulees in western Canada in 2011 can bring a little camaraderie with the likes of Selous, Baker, Bell, and the great hunters of the Victorian era. For me (and I speak only for myself) an NEF single shot just doesn't give the same feeling



















































