Let's see...... a sun cage with glass on four sides......hmmmm can you say mircowave? How about magnifying glass?
The cedar itself is not of sufficient quantity to make it dangerous. With the chips there is more contact with the snake, they get wet and can be ingested.
Why he used cedar though is a good question. It's got to be more expensive than pine or fir, yet he's selling pretty cheap.
It also says that the inside is sealed, I wonder if the outside is as well. As far as I know, shipping glass is a pain in the rear as well.
I'm more inclined to favor suncages made of screen instead of glass. Afterall, glass does filter out the light you're putting your reptile in the sun to get.
Oh well, maybe he'll correct the errors.