For the past few years I have been pondering the idea of a 10 or 25-card collection. In theory, 2011 will be the year that I finally sell off the odds and ends in my collection and only trade-for or make purchases in pursuit of this. Of course, in practice, I'll probably have a 25-card collection
and my pre-1920 Toronto collection, and a handful of 1956 Topps cards, and ... 
Regards,
Richard.