Anyone ever make any? I mean red/blue for the glasses?

https://www.shutterstock.com/search/red-blue-3d

Anyone ever sell one? 

I did a few as a lark, and that was probably 2014 or 2015. Just like 360s or some other unusual methods, there's probably a limited demand.

DT only 390 and no sales:  https://www.dreamstime.com/photos-images/3d-dice-background.html

I was thinking of buying the 3D lens from Canon (Canon RF 5.2mm f/2.8 Dual) to shoot this kind of material (maybe I even told you so). But I guess there is no market or is there? Others don't seem to care so maybe it can be a niche?

Never heard of that "thing lens" before. Interesting and needs a RF camera. But I can see where it's for VR, which is possibly of interest to some people.

I was looking at the Red/Blue passive 3D with the nice old fashion glasses. And yes, I'd agree, there's not a big market and not much interest. But when I saw 500,000 on SS that made me wonder?

Aside from all the past versions, from stereoviews in the 1800s, then the White 35mm rangefinder, that took slides and in the 80s Nimslo with the plastic overlay on print images, the 3D comes and goes. There was the TV fad, with all kinds of systems. Where are they now? And VR seems to be pretty interesting.

Last I saw for a digital camera was from Fuji and they have discontinued that model.

Mostly I see a very limited demand and I was wondering if anyone had seen any life at all in 3D.

Before radio, stereoviews were a hot item. I made this one into an anaglyph image.

It is an interesting idea.

The thing about a niche is, usually if you have at least 1000 files, there will be people bookmark8ing you.

You might need to push for additional exposure by writing a blog post on social media or getting an agency to interview you.

If you do it long enough, you will get customers, but will it be enough to pay for your efforts?

Old novelty photo trick, no market, no demand.