That's really bizarre,
I went to skyscrapersim.com once again.
Now it just show up a blank page. When you look at the HTML, you see that that it has an imported script from sedoparking.com.
When you go to this site, it says that is a domain Parker to resell your domain et a higher price.
And when you go to a domain name reseller like 1&1, it says that you can transfer the domain.