If youโre drying it properly you really shouldnโt be getting any rust. I sometimes get a bit on the handle loop but thatโs it.
I personally donโt get rust but some people do and they can dislike that. Usually Iโll put the stove on low and help it evaporate to avoid rust. Its also really only a concern if (lye free) soap is used because otherwise the seasoning prevents it pretty well
Yeah I got one for free because a family member saw rust and wanted to throw it out.
Scrub, oil, and weโre good to go.
Rust (clean) is actually perfectly safe to eat! And can add extra iron content to your diet if necessary! https://van.physics.illinois.edu/ask/listing/12540
(Most sources assume tainted rust, or large quantities, but small amounts of โcleanโ rust are fine, just donโt over eat iron quantities)