I'd just have fun with them and not over think the matter. My experience with picking guns that females will really like is very mixed. To do that successfully plus identifying the ones that will be blue chips is a tall order.

If they take to shooting they'll let you know what they want. And it'll probably not be what you in your wisdom would have picked. Around here it's usually something rather plebeian, often a stray puppy of a gun, worked over to their fancy, that suits them to a T. Thus it is that I have done up a slightly tired Glenfield .22 in desert camo, rehabbed a pitted GI .45 to a showpiece, and fitted up a set of faux pearls on a charcoal blued Uberti SA.

I have three lady shooters and to my knowledge none of them think of their guns in terms of future value. But they all enjoy shooting in their own way, which is good enough for us.