Like others have said this is natural. You have it much better than I. My current collections I actively look for additions for are: Sassanid Central Asia, (Bukhara and Sogdian) Hepthalite Domitian quadrans Late Byzantine Middle byzantine of Constantine VII Late roman Tetrarchy Nabateans 1750-1900 Mexican Himyarites kolchis Many different periods of Chinese I do not own This is just my "active" collections, I have others I would still buy. Heck I bought a AU bust half last month since nothing on this "list" was available at a coin show I was at. Yeah, you are lucky you are so narrowly focused. Chris