https://www.westerndigital.com/products/mp3-players/sandisk-clip-sport-go?sku=SDMX30-016G-G46B
$50.
Edit: What's the point of open sourcing this product? It's an MP3 player. How does it utilize wifi? Does it run apps? Can it access a file server to download new media? The video and article doesn't go into that at all. BT is nice but Sandisk $50 clip players have had that for a long time.
This seems like 5x the price for a dev product.