Hello. Reading a Russian article about fashion I came across an expression that can be directly translated into English as "luxury for me, not for others". It's about really expensive but not "flashy" things. For example, a very expensive wristwatch wiht a very modest appearance that by no means gives the real price away. The idea is that an owner of the thing knows that he owns a very expensive piece and this is what matters. The fact that people around him are not aware of the real price of the piece is supposed to be of no importance to him. What amazes me is that the author of the article calls this approach "a concept / conception" and I wonder if in English there is a fixed phrase for this phenomenon. Thanks in advance.