Wanted: 1970s-80s push mower

I am looking for a running/operational push mower from the 1970s/80s to complete my lawn care collection. I have my 1977-78 Ariens S-14H, and a 1970s John Deere string trimmer. I am looking for something like a Snapper, but as long as it's in good condition and has a Briggs and Stratton engine I will consider it. Preferably be in Iowa, but I would consider going into neighboring states.

Thanks!