I believe AU55 1884-S Morgan will continue to gain its premium over time. In 2005, it was valued for $345 and now it's $625, according to PCGS price history. http://www.pcgs.com/pricehistory#/?=7156-55 And of course, if you can get the better grade, it's even worth more. :-) I have the PCGS slabbed 1884-S AU55 morgan as well. I have been thinking to send it back to PCGS for re-grading. It looks to me AU58 or MS60. ;-)