So... I'm afraid.
Wacom:
•CTL-672/K0-C (new, about $50)
•CTH-480/** (auction, used, early 2010s models)
•INTUOS DRAW CTL-490/W0 (auction, used, 2015 model, about $20 including
postage) [1]
•CTH-680/S1 (auction, used, 2013 model)
•Cintiq 22HD DTK-2200/K1 (auction, used, 2015 model, integrated LCD but
it seems that the backlight is weak so it might be affordable if I could fix
it)
•Cintiq 27QHD touch (2019 model, ¥241030, has a special remote control
device)
XP-PEN:
•DECO 02 (new, about $80)
HUION
•H950P (new, about $55, seems to work with android)
GAOMON
•M10K (new, 2018 model)
RAYWOOD:
•KUMADORI (I liked it, about $50, functional, but it was released two
months ago)
But how do you look into the freedom status? Maybe I can also look into that?
Or do you have a list?
I got to know even high-end models always have error in accuracy. It seems to
be usually within 0.3 mm but compromising accuracy made me think various
things. So surely I thought that it might not be so useful for my purpose. So
I think I use the tablet for coloring mainly. I would scan my drawings then
color those with the tablet. For that purpose, accuracy is not so important.
Or rather I might like the error. I have tried to draw or cut or something
with GIMP and the red track point of the Thinkpad but it was almost
impossible. So I was wondering how they draw those works with drawing
software but now I think I got it. Maybe they usually use a graphic tablet,
right? But I wonder how about 20-30 years ago was. How did Jurassic Park's
artists make them? by a mouse? It was 3D, though.
In conclusion, Wacom devices are basically supported by Trisquel, so probably
[1] is sufficient for my purpose. It is cheap and relatively new. But my
thought might change later, and KUMADORI still draws my attention, so just in
case, could you check the freedom status of just CTL-490/W0 and KUMADORI?
Thank you.