Toshiba Timm? (Yes, too lazy to google..).
A really large multi-sync 15/30khz RGB monitor/tv. Came in several sizes, up to a 26" or 28", I think. I almost bought one back when they were new. At the time it was much larger than my computer desk could take, though. And the computer desk was the largest I could fit in my room... So that was why I passed on it.
Shipping such a beast wouldn't be a cheap experience... And I have no idea what one is worth nowadays. It depends on how dedicated a collector wants it, I suppose.