I've sent them an email.
They replying saying that it got out of stock in the mean time... and haven't sent it yet.
Maybe still during this week they'll received more.
As I got the order stuck there, I was wondering about this: rf-store - rf-store
If I can build the same frequency scanner with it as well for 2.4Ghz. From the specs it seems so as the frequency can be selected up to
a 1Mhz interval.