It started at $35/unit, in the United States at least. I've still got the invoice for my 256MB Model B...

$35 today gets you a 1GB Pi 4 Model B. For somebody who actually needs the form factor, it's pretty much a fine value.

For somebody who wants a server, it's always been a weird choice. (sorry Jeff :D )

For somebody who wants a desktop, the Raspberry Pi 500+ was a really fun choice when I bought mine in January. They cost twice as much today, which is sad. (although if anyone is feeling the desire and lives near a store, Microcenter has them on sale for $100 off...)