Buying a dress for my girlfriend

I want to give my girlfriend a dress for her birthday. My budget is €60–70 and she wears a size 34/36.
I need your advice, especially from the girls: what do you like? If you have any links, even better.
I’ve found some gorgeous dresses on this site
I need your advice, especially from the girls: what do you like? If you have any links, even better.
I’ve found some gorgeous dresses on this site