I really like HerRoom.com, that bra site gives a complete run down on each bra. From band size to bra thickness, if its running big so size down, they tell you. They give several different pics and many times include a live person wearing the bra in her size to show what it looks like on.
I like Freshpair.com- they have free shipping and they also have a free bra fitting in your own home. They pay to ship to your house, try on the bras of your choice and you send back at no charge to you the bras you don't want.
I like Wacoal.com- B tempted bra's, many are well under 40.00 and 5.00 priority shippping- 2/3 day arrival.
If there is no department store for you to go to to buy, these sites are great for study of and buying.