Canon 5D Mark IV vs Canon Mirrorless?

[kunin]

I have noticed that second hand Mark IV's sell for much more than some mirrorless models. I have not done much research into mirrorless cameras and so do not know the difference between the models though would be interested to know why the Mark IV is more expensive than mirrorless?

Also, which mirrorless cameras would you rate above the Mark IV?

[Waddizzle]

I offer no explanation for the asking price of the 5D4.  The R5 and R6 series of camera bodies are better cameras.