Used good local driver in Panama City
I saw this post on Reddit
https://m.reddit.com/r/Panama/comments/4ebtsc/8_hours_in_panama_city_panama_travel_to_blank/?ref=readnext
And contacted the driver Santiago on whatsapp +507 65394019. Gave me a very fair rate, $16.60 per hour (including airport pickup and drop off, no extra charge for tolls) and showed the highlights of Panama city over the course of a couple of days. Good guy.