The MyDigitalSSD SBX SSD Review: NVMe On The Cheap

512 GB for $158 is not "cheap"

Case in point:

SAMSUNG 850 EVO 500GB - 125€

SanDisk SDSSDA 480GB - 114€

Crucial MX300 525GB - 123€

Well, yeah it's m.2 but even then, if you're on a budget you probably don't care what kind of SSD you buy, as long as it's an "SSD"

/r/hardware Thread Link - anandtech.com