Hi,

I have never been, but the British Ladies Club has a weekly thrift shop. They advertise this in The Broadsheet and InMadrid free English publications. Also, at their Christmas Bazar, they will sell used clothing (from 12-6 on December 1st in the Hotel Tryp Centro Norte (near Chamartin train station).

I'll be there shopping for toys and gifts which they'll also have!

Good luck!