I didn’t know either until the first one I did. It is shockingly easy and not dirty like you might think. I’ve probably replaced at least 10 of them in the last 15 years between me and people I’ve helped.

Given what a plumber costs, no one should ever pay to have it done. A toilet costs $99 and the whole job takes maybe an hour including unboxing and cleanup.

You’re a generous person for saying you’d help, though.