Not to mention the fact that they do a terrible idea conveying what they're actually selling -- there's nothing that says simply "it's grey paper with white lines."

"On Whitelines there is no visual interference between the lines and the pen colour."

So, the lines on the paper are different depending on the color of the ink I'm writing with?

The description we find on websites about the services or products they sell, are in almost every single case pretty bad.

I always end up going to Wikipedia to understand what the company is selling.

The 2300USD listing is from some separate seller called "Stork Group", not Whitelines. And they describe it as "Brand new and unread!", so they probably have no idea what the item is.