Posted By: 
deadballeraI've been collecting Obaks for the last 10 years. As everyone has mentioned so far...the 1909's are the toughest.  When I first started collecting, there was a card store about 5 miles out of Sacramento that had about 100 Obaks for sale. Eventually I bought almost all of them, as this store was in a really small town.  It was good for me that this was kind of a hole in the wall place but never-the-less, it started a set that I want to finish. 
Another tough card in the set is a player named Ten Million, in the 1911 series.  I have seen about 3-4 of these over the last 3-4 years on eBay.  I finally grabbed mine a couple of weeks ago from Promised Treasures.  They offer various conditions on eBay and as another collector says....they are very professional.  
Todd