Adorama has a daily deal on the Prograde Digital Cobalt Series 650GB CFexpress Type-B 2.0. You can pick one of these up for $449 (Reg $769) Prograde Digital Cobalt Series Key Features Prograde Digital Cobalt Series 650GB CFexpress Type-B 2.0 Memory Card $449 (Reg $769)
Sabrent Rockets are $150 for a 512GB card and after at least 50,000 shots over the past 6 months on 2 cards, they've shown zero hiccups. The company also holds the flag for most reliable solid state drive in a computer currently (2023).