For reference:

- BeagleY-AI - 4 TOPs - $72.00

- BeagleBone AI-64 - 8 TOPs - $187.50

- Jetson Orin Nano Dev Kit - 40 TOPs - $499.95

The 20 TOPs Jetson Orin Nano seems to only be available in a commercial module, not in a dev kit. The commercial module is priced at $259.00.