I agree, price sounds about right. That was my estimate prior to the 2019 season, that it would require 4 first round picks to move up for Tua.
That was based on Tua remaining healthy and having another dominant season. With Burrow it's somewhat different because he's older and has done it for only one season. IMO, that would drop the logical price to 3.5 first round picks, or the equivalent. Maybe between 3.5 and 3.75
Too many people are focusing on past examples of price and not the situational influence in play right now. Cincinnati knows Miami donated the season for this opportunity. That's why the price to Miami would be higher than toward some other team that played 2019 normally and just happened to wind up at #5 with a quarterback need.
The silly trade numbers have come from the mock trades that look at this terrain normally and go by the chart alone. Every Bengals fan would be rightfully outraged if they accepted some insulting return like a Kelley Book number.