Buy the separate components for the Raspberry Pi assembly, all of which are available on Amazon, and assemble it yourself.
You will need a Raspberry Pi 3B+, a suitable enclosure / case for the Raspberry Pi, a 5 Volt x 2.5 Amp power supply with a micro USB connector, and a micro SD card.
We recommend the use of a good quality case, typically cast aluminum with good cooling. The cooling can be either fan assisted, with heat sinks fitted to the components, or by conduction out to the case.
As a minimum, a 16GB Class 10 Micro SD Card should be used, although 32GB is currently the best value for money.
Once you have assembled your Raspberry Pi, and have purchased a license for a copy of the SystronicsRF Control System Software, you can flash the SD card with the core software, and register your new Control System online.
Onscreen guides are provided for this purpose.
Please click on the "Choose Option 2" button and select Option 2 to purchase a software license.