About $190. They fail in 2 ways. Corrupt firmware and electrical board failure. Since the firmware update seems a permanent fix we've stepped up our buying and selling. Salvage yards just pull and sell for the most part. We don't even test modules from yards or core returns. They go right to the bench for flashing.
Only after successful flashing does testing begin. Testing is pairing phone, pandora music stream, Voice command FM channel change, send text message.
Last test is Thermal. That involves point thermal camera at the module 30 minutes after vehicle is off to verify module is powered down.
Since 95% are firmware that's how we can offer core refunds.