These stamps from Guinea Bissau were issued in 2008 and feature both vintage and modern Vespas as well as an assortment of Odd Scoots like the Peugeot (labeled incorrectly as a Vespa) and a Rumi. And they’re pretty easy to find using the Google thingamabob. Prices seem to be well under $10 per sheet.

Thanks to Julie G. for this find!