There is a serious shortage of Raspberry Pis, sold out everywhere. Here, they are using the Pi 4 8GB, which is normally 75€, but expect to pay double if you want one now.
They also sell the box without the Pi, SSDs, antenna and fan for 150€, it is up to you to decide if the price is justified, I think it is a bit on the expensive side but not unreasonably so. But if you intend to DIY the same configuration they are selling for 540€, you won't get that much cheaper.
They also sell the box without the Pi, SSDs, antenna and fan for 150€, it is up to you to decide if the price is justified, I think it is a bit on the expensive side but not unreasonably so. But if you intend to DIY the same configuration they are selling for 540€, you won't get that much cheaper.