The price of old printed circuit boards varies from € 0.40 / kg to as much as € 30.00 / kg! Printed circuit boards contain metals and precious metals. Printed circuit boards with high concentrations of gold, silver or palladium are the most valuable. Older printed circuit boards have higher concentrations of precious metal than younger generations. Furthermore, it can roughly be said that the more advanced a printed circuit board is, the higher the value per kilo.