Adorama has a 2-Pack of Sony 64 GB M Series UHS-II SDXC for only $83.96. Compare with a regular price of $112 seen at other stores for similar bundles.
This is a really good price for fast UHS-II cards rated at up to 260 MB/s read and 100 MB/s write. The a7R III and a9 both take UHS-II cards.