Find out what your cost would be and then see if there is demands on the forums for it and if there is, have people pre-pay for them.
I don't see any reason why you'd need to have these in hand first in order to sell them or to see if there is any demand for it.
You never know until you ask, right?
This is guesswork and estimation, based on inquiries I made while building my dynamic marquee dynamic bezel machine.
I'm going to ballpark that it would go like this:
Randy takes your advice.
Randy does a bunch of legwork and determines his cost would be about $950 if he jumps through a bunch of hoops and picks them up personally in bulk quantity off a Chinese cargo ship dockside at the port.
Randy asks if there is demand on the forums for a dynamic marquee panel.
Roughly thirty people say YAAAAAYAYAYAYAYA!!!!111!1!!eleventy1! believing that it will cost roughly two packs of gum and a cracked dust washer, or at most, 1/3 the price of a business surplus PC monitor off ebay cause it's about 1/3 as big, right?
Randy asks if there is demand on the forums for a thousand dollar marquee panel.
Everyone gets real uncomfortable. A few brave souls wishing to save face from their previous outbursts of overjoyed enthusiasm say "Uh, yeah, I'd totally love one of those... sometime... later. In the unspecified future. Yeah..."
A single forlorn tumbleweed rolls by, blown by the wind, the only sign of life henceforth in the thread.
Randy takes a deep breath and attempts to show patience in the face of our antics, as usual.
Street price from Spanpixel is about $1250 in the continental US. If you were in the right part of China and could do the entire export process yourself, you could get them for $800, which is the "moon rocks are free, on the moon" price.
You wouldn't buy one at $800. I hope I just saved everyone some time.