Well, classics will always be my favorite <3 and a crucial symbol of classics is the Little Black Dress (LBD)
I saw this Helmut Lang model LBD, that looks really nice <3 and most importantly, is affordable! (£218.94) It may be pricy, but you have to give up some money for a good black dress! Plus this price is really good comparing to other designer prices.
You can click here to buy it.