There's demand for expired color films from Holga/Lomography folks. I've bought a lot of old C-41 and E-6 films for my daughter to use creatively in her Holga, all get processed as C-41. There was this really ancient EPR120 (Ektachrome Professional 64) we had that was really wonderful. Other lots of Ektachrome 64 and 100 have been too well cared-for, they're now being aged. There's a brick of Kodacolor II (C120) that's still embarrassingly good, the color balance isn't at all far off, only one dye layer is weak, it must have been frozen since new. Once you fix the color balance in scanning, that Kodacolor II has the classic color palette of that film, from before the "color saturation wars" started.