[ilaksh]

This one is not very big but is only $200 something:

https://www.aliexpress.us/item/3256804712947613.html

[zimpenfish]

I think I'd probably go for this one[1] - smaller (12.5" vs 10.3") but just over double the pixels (1872x1404 vs 1304x894) and 16 grayscales for about the same price.

[1] https://www.aliexpress.com/item/1005004037729951.html

[aembleton]

And it supports red. So you get, black, white and red pixels.