E-bay knows about american girl dolls?

So, I was researching the internet for any more information on the possibility of the re release of Samantha, and I found that e-bay has an entire page dedicated to the knowledge of american girl dolls. Everything about them. It is dated in 2013, so it's pretty recent. There are more than 1 guide as well... This article has everything you would ever need to know about AG. The company,the dolls, everything. Although I think you can just write articles, so we don't know if this is a credible person or not. But this is a ton of information.

 here's the link:http://www.ebay.com/gds/American-Girl-Dolls-Buying-Guide-/10000000177628736/g.html

So, do you guys know about this? Comment down below!