For anyone interested, here is a chart I am compiling to know exactly which is the stuff that pays better:

https://docs.google.com/spreadsheets/d/1YUoYYF1otLAsILTIbR6trRXdohVs_jFnrq6GhqqObYY/edit?usp=sharing

At the moment the values are f*** up, because I compiled it with values from "while playing", meaning that there are % from TECH levels added to the values.
As soon as I'll begin with a new map, I'll fill in all original values (map start), and then I'll add the options with the increased % selling prices coming from TECH research.
The spreadsheet does NOT keep into account the PERMANENT UPGRADES.
I'll probably add this in the future... if there will be a way to get back to the initial values!

For all the rest (smelting times, etc.), there's Mastercard.

P.s.: BTW, don't forget that if you have a Google account, you can always duplicate the sheet in your Drive and change the values to your pleasure.

Edited 8/26/2020 07:53:01