I asked them about the incident.
In my case it was stargate3ds.at and an SX Pro.
"Dear friend,
our website works well, but we have set IP service restrictions based on IP in different countries. Restricted area visits will be displayed "Site Closed" but in fact the site works well. This is to prevent other sellers from following our cheaper prices. I hope you can understand, but sometimes the functions of IP restricted access will Work is not good, resulting in your IP can not be accessed, please understand this situation.
During waiting, if you do not want this order, you can tell us at any time and we also do a full refund.
Thanks.
Have a good day."
I hope this is legit.