I have used lots of Heroclix/Horrorclix and still due cherry pick various ones as sets come out. As ghornet stated they are 1.5" bases, but I have always just popped them off their bases and re-glued them on 1" bases. I buy 1" circles of mdf board from a company called Sarissa, prime and paint black, and re-base the figs with E6000 glue. It is a little more effort, but the big bases drive me crazy when trying to play on my 1" hex game mat. Other good places to look at buying clix are: Troll and Toad sometimes have random lots cheap; but mostly I have picked up singles at Coolstuff, they have $.99 shipping on singles so you can pick up a few without dreading the shipping. Other than supers, I have built up a collection of civilians, police, military, etc. I also use flats for various genres; they are great, especially when you need a lot of the same. For a stand, I use the same 1" base and 3/4" binder clip. Take the binder clip, remove the silver handles turn upside down and glue on base. Then I take a silver sharpie and number them, so when I have 12 of the same Zulu Warriors, I can keep track of them.
