Yeah, that's the trick. You want something that intersects with "stuff I know person X is interested in" and "stuff that I know enough to make an informed purc

Yeah, that's the trick. You want something that intersects with "stuff I know person X is interested in" and "stuff that I know enough to make an informed purchase on and X probably doesn't already have". And consumables are a good way to solve the "doesn't already have" problem.