Old crt, not the trinitrons, are worth next to nothing.
I go to county surplus auctions, where they get rid of computer gear whenever the county upgrades.
I see palettes, stacked with monitors, 8 on each layer, 5 layers tall, so 40 monitors.
The whole palette usually goes for about 5.00 .
And they sell probably 5 or 6 palettes like that.
Its sad what some of this old stuff goes for, considering how much it cost.
I saw a IBM AS/400 going for 10.00 and that was only because it was with a desk the guy wanted.
He was asking people after the sale if they wanted it to keep him from having to move it.
example:
One of the auctions.
http://floydsauction.net/041505auctionw.html
That whole palette of imacs went for 15.00