This dress is currently available at the Gap for $69.50! Cotton/silk blend! Wouldn’t it make a great bridesmaid dress?
This one from David’s Bridal is quite similar (comes in blue too), but I don’t like it as much. And at $135, it’s twice as expensive!
Also compare this Priscilla of Boston dress, in black and white (it also comes in blue). Not sure how much it costs, but I’d imagine it’s the most expensive!