I'm no computer tech and don't even own a laptop, but there are probably considerably more options available to you than were offered by Mister Repeats Himself @ authorized repair center.
For instance, I quickly found this new Toshiba screen available on eBay Express:
New Toshiba Laptop-LCD-Screen Panel 12.1" P000262810
$75.00 | Shipping: $16.95
I have no way of knowing whether it's compatible with your Toshiba, but I think you'll get my drift.
Here's a link with a lot of other new
Toshiba replacement screens, none of which cost $500.00. You would need your model #, screen size, resolution, and a competent technician to install it, should you choose this route.
This seller even offers step-by-step screen removal instructions with photos.
Explore more options, including a replacement computer.
All of the data on your present laptop can easily be moved to a new computer, tippy.