If you drop names like
Gucci and Neimans in casual conversation, you are kinda asking for trouble even though you don't mean it that way. In my experience, the best approach is to avoid drawing attention to that kind of thing.
Some of my classic responses to where did you get that/how much did you pay for that:
Oh I bought this online. (don't mention the name of the store)
How much did it cost? Oh I got it on sale. (don't mention the actual price)
I had to sell a kidney to buy these (again don't mention the price)
My mom gives me her hand me downs.
When talking about designer clothes, I might say I think they are made in Italy (don't mention they are
Prada, Gucci etc...)
I only talk about my shopping habit with people who won't feel bad because they can't afford to spend so much.