Good points, PrinzEugen, and yet you still want one - just like me lol. Maybe it is the name - it might not have been so popular if it were called the "escaped livestock eliminator" :P I have been trying to find out how enforcers fair on the North American gun market (how much they sell for, how often they sell, etc), but I have found almost nothing.
I did find an interesting website regarding Parker Hale sights, for those who might be interested and don't know about it -
Service and TArget Rifle Sights ~ Parker-Hale and B.S.A.