Hi. I'm making my first rather big purchase a Cartier tank. It has after market diamonds. Could someone guide me to the price. It's 2650 USD LARGE FACE Comes with original box and the owner is looking for warrenty which she is certain she will find. Does the after market affect the service and will it affect the overall value. How do I know this is a fair price (I think it is) . It's in immaculate Hardley used condition and I really love it regardless. Your help is appreciated.