Although a lot of responses tend to laugh off this subject, people generally don't like to think about their own death, it's a fairly serious subject to anyone who has substantial money invested in any area (watches, jewelry, art, coins, whatever). If you don't have someone that you trust to liquidate your collection it does run the risk of being scattered to the winds at 5 cents on the dollar, or stolen, or worse. To some souls this is no big deal as they won't be around, so who cares? Others care deeply about what happens to their collections, it's important to them because of all the time and care and money they put into putting the collection together. So everyone should do what is important to them. If you want it passed on, or liquidated to maximize value, then make those plans and have them all written and documented, and have someone you trust, or pay, to oversee the operation. To those that don't care, don't do anything, your stuff will get scattered one way or the other.
I keep a binder with all our valuables (mostly watches and jewelry) photographed with spreadsheets describing the piece, purchase value and date, and realistic current market value. For the watches each watch is assigned a number which appears on each photograph, and that number matches the spreadsheet, and that number is put on each watch box/paperwork. So all anyone has to do is match the watch to the picture, get the box that has that number, and you have the complete package. Whether it gets liquidated properly is always the unknown.
All I would recommend is to think about how important the value is to your estate and go from there. Do the work, live well and hope for a long, healthy life. You never know when the end will come.