Well I started out by buying a couple of Harbinger starters. Then a couple of boosters. Then ten, and another ten, and more... Then I just bought the ones I didn't yet have from Popular Collections. For Dragoneye I just bought two cases and then another order of singles to fill in the gaps. Same for Archfiends.
Now that I've about tripled my 20-year collection of minis in few months I have sworn to stop - or at least slow down. I'll have to see what all Giants is going to contain before deciding if I want to maintain a
complete collection. However I also have a list up on maxminis to see if I can trade away some of those multiple rares I have no need for to get some of the rares I want more of. My needs are strictly RPG/collector related, I haven't yet played the minis game and don't foresee doing so.
http://www.maxminis.com/hwlist.asp?user=duanevp