Wow--that is spendy--I checked with a local shop here that is a Cooper dealer..they indicated for something in the .416 caliber, the price would be around $3785. US
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Cooper is only about 3 hours from my house..plan to stop by while "working" to check one out..when I do --which will be sometime in the next 2 months I will advise..

Also a friend of mine handles their account for insurance so he knows a lot of the guys inside said he will arrange for me to visit with one of they guys in the shop..

Ripp