On Gumroad: gumroad.com/l/HgADn
On Cubebrush: cbr.sh/9osdnk
The asset contains:
33 postals & cardboards (from 44 to 354 tris)
all vertex colored
vertex colors saved as textures for compatibility or color tweaking
Licence: CC-0 universal (Public Domain)
I might open a Gumroad shop too, it seems it will be less annoying with "commercial" licenses & shit.
As long there is a pay-what-you-want feature I don't mind.
You can "buy" my assets on Cubebrush as "personnal use", it's not a problem.