I don't know about age as they still make CAO meerschaums to my knowledge. I believe they range from $45 new to upwards of $300. It all depends on the size of the pipe and the quality of the meerschaum. It also depends if it is a real CAO or if it was just put in the box (though I don't know how the custom box could fit another pipe?).
Here is a link to some info on Meerschaums and you may want to contact Fred Bass, the author, and I am sure he could help you out more than I. He is a very nice man and I am sure he would have no problem answering your questions. Sorry I am of no help directly.
http://pipesmagazine.com/blog/put-th...pe-experience/