My company
$1 and we have the 20 Plus and Writer in stock now.
Definitely recommend the 20 Plus over the older 20. It has built-in translation as well as a clock and other features for $100 more.
The 40 is nice but unfortunately delayed a bit due to Covid-19, latest ETA December.
TBH on the BrailleMe, we used to carry it but to my knowledge, there hasn't been a firmware update since the middle of 2019, nor a driver to work with the latest NVDA. I'd love for more low-cost braille displays to succeed, as it opens up a world of possibility for people who couldn't afford a braille display previously.