Buffalo Nickel, Steel Penny, and 1939 Nickel

I was checking out my bag of foreign money and somehow these guys were in it. Obviously the buffalo Nickel and the penny are in pretty rough shape, but I'd definitely like to know if they're worth anything.

I saw a listing for $900 for a buffalo Nickel about the same condition as mine. I call BS so I just would like to see if this is accurate.

I was reading stuff about the penny, and saw a listing where it was "missing" a 4. Mine is "missing" a 1 and a 4 and has the S mint. Am I tripping or was it just rubbed off?

The 1939 nickel, I saw a listing up for $700 for one in just about the same condition and I would love to know if this is accurate.