Local computer shop had a bunch of HP M700 SSDs, 120GB, at CAD$30/each. I bought five of them. They appear to be exactly the same as the HP S700 SSDs, but probably named "M700" by mistake before somebody realized HP already had a different product called M700. That's my theory.

Kingston also markets $30 120GB SSDs (Amazon, and my local shop), but they are a little bit slower.

These are all part of the new wave of "DRAM-less" SSDs --> omitting the DRAM buffer saves on price, but costs somewhat in endurance. The ones I got claim 70TB endurance.

They're just so useful in combination with a CAD$15 UASP capable USB3-SATA adapter cable. I put the Win10 from my new XPS 13 onto one of them, and boot it from USB to check for dock/device firmware updates.