...yea mark writes lots of those short articles on whats out there thats not always obvious to the collectors that mite be looking for something to collect, operative word "collectors"...many of his articles r collector based as opposed to investor related n definitely not dealer related...the hints in this article r "bargain" n "common", this particular series allows the collector to feed his collector habit at relative low expense n not a difficult series to search for, the coins r basically common bullion coins n easily obtainable in mint state, if one chose to he/she could complete the entire set in a month or two, if funds available, only one semi-key date n it shows up in lower mint state the rest routinely mid-grade mint state...there r several diff series that fit this same bill, netherlands 10 gulden comes to mind n a few others...plus as mark mentions it gets ur foot thru the gold door if one is so inclined....