Dyoald Young's Books

Hello there guys, i'm really wanting to purchase Doyald Young's books, but they aren't the easiest to find, especially in Europe. I found this website, and they have the boxed set for sale:

However, there is zero contact information on the site, and i'm a little wary spending $300 when I don't even know if i'll get the item, I don't see the boxed set for sale anywhere else like Amazon. For this type of purchase I would want to track it and insure it, but there are no options for that.

Does anyone know if the site is legit? Or if there is anywhere else I can buy the boxed set?