Sure fire selling... if only I had some...

[ypdc_dennis]

My first thought when reading was that these would sell really well on ebay...

Japan Post Office is issuing Pokémon stamps...

https://wow-j.com/en/Allguides/other/tips_manners/007_541663_en/ 

😉

[femmefan1946]

Maybe -- but I have tried the Star Trek ones with no success. And the "hockey card" stamps.

There doesn't seem to be much crossover between the hobbies.