Catmint, as far as I can see Bill isn't selling just 2 of a variety, and so far between us I don't think Aspenhill & I are ordering more than 3 varieties ('Grey Ghost', 'Kathleen' and maybe 'Red Flash').
If you want more of an assortment, check out his mixes or caladiums by the pound. He's listing 10 mixed grade 1 bulbs for $11, add $1 more if you want to choose between white, pink, and red varieties. He also has some nice labeled assortments if you look on the "collections" page,
http://www.caladiumbulbs4less.... . If there's a collection that catches your eye, LMK... maybe we can just split a collection and a set of colossal Grey Ghost.