I recently ordered this dress online from Missguided - in black but there are many colour options. I've included two pictures, a view from the back and front in two different colours.
Anyway - it was only £30 and made in quite a nice thick viscose so you don't get VPL - it looks far more expensive than it is and shows off my back (one of my good bits). Highly recommended. I would, however remember that cheaper brands tend to be less generous with the cut, so if you're sometimes a 10 and sometimes a 12, I would go for the 12. I did and it fits perfectly. I suspect the 10 - my usual size might have been a bit tight. Also I'm 5,8, and 'maxi dresses' sometimes just go down to well above my ankles.
The downside is that their delivery service is Hermes, about whom I have heard many a bad story.