I think Nordstrom does a nice job of catering to older women who shop online, but really, can we just stop saying "older women." I like, stylish women with purchasing power, access, knowledge and confidence. My clients have all been over 35. They are mostly crunched for time, but they usually enjoy shopping and that is why "environmental" department store sites–sites that make you feel as if you are in the store or a spectator at a runway show, sometimes work well for them.
It helps, no, it's critical, to know just what you're after, before shopping online. That is something my clients discover though the styling service I offer at MyStylist. I also shop with clients as many stylists do. Once armed with a good list of purchases to optimize their wardrobe, clients may rely on a personal shopping service provided by a store or a good and honest friend. BUT, be wary of a "good friend." They are either good and not too honest, or they are honest and not too good! I really think it is best to higher an honest professional.