How to Create and Curate a Postcard Collection with Mark Routh Postcardist

Mark Routh joins me this time to talk about curating his world-class Covid postcard (and associated mail and stamp) collection. He gives pointers to budding postcard collectors on how to start and where to focus to build a collection. 
You can find Mark's work many places, including as a long-time author at Picture Postcard Monthly and at his blog -- Mark's Postcard Chat