They are very rare. They have the larger magazine box, and higher grade wood. They also had island leaf sights. They came in .375 Holland, .416 Remington and .458 Lott (or Win Mag, not sure). One year only they were made in .416 Rigby. They all sold in the range of $4500 during the years they were made. The only one I know of that sold in recent years was to an AH member about 2 1/2 years ago from a Cabela's. Don't know what he paid. I have never seen one in person. I would expect to pay in the $6000 range range for the Rigby since they are less common than the others, and around $5000 at least for the others IF you can find one and the owner wants to sell. They look more like a Rigby than a Winchester. Good luck, and if you find one, post lots of photos!
Thanks for the info. I am fully aware of all details of the Custom African Express. I was in hope that this rifle might have been one of the few. Winchester really got it right on this one!