Second hand clothing stores Paris?

Just google thrift shops. Another option is "brocante".

To search for stores selling used clothing, google friperie. Another term, for consignment stores, which are often more upscale, is dépôt vente.

There are many second hand clothing stores in Paris. If you do a search for "friperies" and "depôts-vents" in Google, you will see many listed and many articles about them. There was an article about some depôts-vents in Paris in April in Vogue Magazine. What do you mean by still relevant? Are you asking if there are used clothing stores in Paris, the answer is yes. If you are asking about any specific store mentioned in one of these old posts, I suggest doing a Google search for the name of the store.

One place that I could highly recommend is the Marche d'Aligre closed Monday. No matter how many days I am in Paris I always, always go to this Market. Another place you might search are the kilo shops. It's just like it says you buy items by the kilo. There is also a shop on the rue du temple, right next door to the Paris France Hotel. I believe it is part of one of many shops. They were also a couple of shops that I found in the Marais, very close to the church.

@janet_Kupfer, would you mind saying which church you mean? There are a number of churches in the Le Marais and it might be helpful to the OP or other readers looking for second hand clothing stores to know the specific area that you mean.

You're right of course! I'm in Italy at the moment and had been traveling for two weeks and didn't think through the question. I'm still here in Italy so it's the large church by the Metro station.

Must be Saint-Paul, then.

If it's Saint Paul, maybe one of the stores is Come on Eileen, which is down the road on Rue de Rivoli.

You may also want to look at Golden Goose, they do offer recycled/repurposed stuff. Not cheap.

there is a kilo shop right at the beginning of the passage next to the Grevin wax museum. I think it is the Passage Jouffroy.

Galeries Lafaytte has a nice resale boutique/area: https://haussmann.galerieslafayette.com/en/espace-re-store/