who cares,
my wife buys tznius clothes at non-frum stores for a fraction of the price of the frum stores. The drawback is that you need to spend more time going from store to store and looking through racks and racks of non-tzniusdik clothes till you find something, as opposed to going to a frum store where hopefully most of the stuff is ok. But don’t let your financial situation cause you to not dress tzniusdik.
Try Fox’s clothing (foxs.com) , or try the department stores (lord and taylor, macys etc) when they have sales.