Flex PCB (JLC PCB): $2.00 (5pcs)
Card PCB (JLC PCB): $5.20 (5pcs)
12402075E512A (Digikey): $1.28
USB4155-03-C (Digikey): $1.62
UB21F-B011-HLRG23-P (LCSC): $1.16 (6pcs)
5034800800 (LCSC): $1.45 (5pcs)
And a few cents on passives (ESD, choke).
For a total of about $13 USD excluding the enclosure and shipping.
The enclosure (JLC CNC) itself was $29.21. I’ve been wanting to try the CNC service and this was the perfect excuse to do so. Unfortunately the colour doesn’t quite match the Framework chassis as I was hoping, and I scuffed it up really bad on the underside during assembly (but who looks there?). You could have it 3D printed instead for <$1.