i found a monitor for sale. its a toshiba 32 2006 model. it doesnt say if its hd. i dont know if monitors in 2006 were all hd yet. the guy says he paid 700 for it in 2006.
It isn't worth buying a monitor from 2006 unless it's cheap. He paid a lot because LCD screen technology was still a new thing then, not only that but it was still fairly poor quality. A display of that age is likely to have poor definition, slow response time and a narrow viewing angle. I wouldn't pay more than $30 for it, no matter how much it cost when it was new.
look for the resolution, full HD is 1920 x 1080, HD is 1280 x 720
It depends on the screen resolution of the monitor. If you can find out what it is, anything that's 1280 by 720 pixels or higher is HD.
