The relevance of postcards...

Postcards are an inherent part of social documentary. Since earliest times, they have been used as secondary historical documents. From the very first days of photography, with large plate cameras and extremely lengthy exposures, to phone cams and instagram style postcard templates - even to such sites as
www.mypostcard.com where you can send a physical postcard (Stamped and posted) direct from your phone.

In previous decades / centuries, postcards were often used to document local and social events (The example used in the text below is a barn collapse) as well as the more "touristy" versions we are aware of today. This is the concept I am using. I'm starting with the generic "Sunny Weston" style of image, parodying the "end of season" sale, and then moving towards a more informal "social documentary" style.
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It is "Idea No 45" in the "100 ideas that changed photography" by Mary Warner Marien, Laurence King Publishing.

As it says... "These countless images constitute an informal and largely disaggregated archive of local history and everyday life."