Jim, I may be waaaaay off base here BUT, is it likely the majority of these SIM owners are teenagers? If so, and though I may get flamed, I would think they're used to getting things free (or warez'd). So, if my supposition is remotely on target, I'd think your only choice would be to go for a low price/hi quantity sales. I'd wonder if something in the $5 area for a set of 4 or 5 figures.