Where you looking for a green screen or colour monitor ?
I have a Kaga green monitor, has a removable xray (lol) filter on front, so 1984. There will be a fee since I dont have many of these.
I cant do colour composite, to hard to get,I use 14" tv's other than that I dont sell my Apple monitors or commodore monitors (I want 1 monitor per computer).
I have no doubt in the future monitors will be very hard to find in good working order or even working LOPT's.