There were years in the past when I probably spent less than $100 on clothes/shoes for myself. I got a lot of hand-me-downs from relatives, and I was happy to wear the clothes I already had in my closet.
But lately I decided that I need to take better care of myself. I don't know if I'm vain or self-centered or just human... but I am happier in general when I feel attractive. So I've been making an effort to take care of myself lately- including better grooming, nicer clothes, exercising REGULARILY. Not only do I feel better about myself when I'm well dressed, but I've found that I'm treated with more respect by others, and DH appreciates my efforts as well.
I haven't really kept track, but I'd guess that I spend around $100-$150/month on myself, on average. So obviously I'm not spending money on high-end items, but OTOH I'm trying not to buy clothes that will be unwearable after only one season.
fek&fuzz- OMG, the eileen fisher stuff is beautiful

there aren't any stores near me though... bummer.