Hello, thanks in advance for any kind help.

In a few weeks I am off to Paris. I would like to know from anyone who can help, suggestions for "good" places to search for discontinued/hard to finds.

I know of the Porte de Clignancourt market. I know of the 9th arrondissement (but not any specific stores/areas).

Any other tips? Places to search?

On my last visit, last year, I found a few places "off the beaten track". This time I want to save a bit of time by knowing where to go, from the off.

Again, any help much appreciated