NVIDIA has released a cheaper version of the Jetson Nano Developer Kit, its developer board with a 128-core GPU. The new model has 2 GB of RAM and retails for just US$54. There are a few compromises from the US$99 Developer Kit, though.
https://www.notebookcheck.net/NVIDIA-Jetson-Nano-Raspberry-Pi-alternative-gets-cheaper-US-54-variant-with-2-GB-of-RAM.497483.0.html