Does this thing have any use or should I junk it?

As far as I know, those are just a cardboard tube with a couple of mirrors attached so you can see the front of a color TV set while adjusting it in the back. You could always offer it here in the ad section.

I have one of those, but the mirrors came unglued and some of the silver came off at the same time. Novel, but mostly useless. I just put a large mirror in front of the set and view from the back, when I am unable to adjust from the front.

Thanks, guys! I appreciate your thoughts. If someone is interested, I can make a deal. The mirrors are loose and a bit desilvered. I thought it might make some kid a good periscope!