Interesting. I bought a 250 Land camera a few months back (entirely automatic exposure, I jury-rigged a battery, and it's fine) for $30 - it came with the original case and a bunch of other things inside including "Polacolor Print Mounts" - not exactly postcards, but basically cardboard/stiff paperboard with peel-off adhesive on one side.

I've only shot one pack of 667 with it (not cheap locally), so nothing worth mounting just yet, but we'll see

With the demise of Polaroid's film production I'm hoping Fuji (or someone) keeps the torch alive - the Fuji variety isn't available to me locally, so I'll have to start ordering it online...I'm really fascinated with it, and the 3000 ISO film has interesting tonality (DEEP blacks).