Ah, that's right! I should have remembered, I have about 5 of them in my home shop setup.
Arduino Nano seems to be closer to $20 rather than $2. Where did you get that figure from?
Arduino is open-source. AliExpress has clones for under $2.
For just one unit I will just buy the original, I think, and support the project.
If you really want to overpay for what's basically a commodity these days, to support a project that was already wildly successful a decade ago and has outside growth several times the size of the original project... go ahead.