I have one...
They are nice, but a shipping nightmare. They are 18"x84" long and very flimsy. Normally, they are in a frame and there is one translucent panel on each side. I picked mine up with a Pathfinder and it just barely fit.
Also, when buying just the one side, you have to factor in building a box around it so that it doesn't break. They are vacuum formed thin plastic that after 27 years are very very brittle.
If someone is sending it to you, pay extra for insurance and extra crating (ie a wooden box around the panel to protect it).
By the way, that is an excellent price....