I think it depends on the individual value and what price you want for them! For instance, a couple of years ago I had a group of 6 very nice condition (EF or better) 1930s/40s farthings - cant remember the dates, so dont ask! Listed twice as a group for a tenner plus a quid P&P, and got no more than 2 watchers either time! Listed separately at a quid (plus a quid) each, and sold all 6 to a total of £23 plus P&P! Five even went to the same buyer!