Do you prefer to buy a single illustration/icon pack or a bundle?

I prefer to quickly grab one free one and run, but to be serious, you made me think. I am not a designer and only need those assets once in a while. I would only buy a bundle if I was committed to using that particular style. Otherwise I try to find one item most closely matching my needs and then modify it. I think the current business model of those websites works, but there is room for innovation if you target a particular type of customer. I hope it helps.