Well, I have been collecting for over 30 years, off and on, and I have tended to concentrate on farthings. In other denominations, I haven't got much 1860-1900 just because it tends to be more expensive. I've just been reading through the March LCA auction catalogue, with the Finchampstead collection of farthings. Apparently, I'm missing nearer 28 than 8! These are what I consider to be minor varieties and die errors (broken letters etc) so I'm not too worried - I have quite a few varieties but it's not the end of the world if I don't get them all.