This smart pen selling for 400$ is available for less than a 100$. It is the OPHAYA SMART PEN,
google it!
It's sad to see a magician looting other magicians.
https://ophaya.com/collections/smart-pen/products/ophaya-smart-pen-1-pcs
I agree. They should be ashamed of themselves. I just got mine (from Ophaya) and I paid $50 (1st time order) including shipping. It comes with the note pad, ink refill and charging cable. Doesn't come with index cards. So, I guess that's how they justify a 500% markup... by adding a few index cards. They didn't even bother to change the packaging!