Hello and welcome!
Start by learning about tantalum, you can sell them straight away:
http://goldrefiningforum.com/phpBB3/viewtopic.php?f=59&t=15909
http://goldrefiningforum.com/phpBB3/viewtopic.php?f=84&t=21530
In MLCC you could find palladium and silver, in resistors platinum and silver but those comes with a warning called ruthenium (please search on this).
Gold will be in most, in your case all, black epoxy covered integrated circuits. You highlighted only the two sided IC chips but all quads will have more. It id also in all connectors, VGA, LPT, etc..
My 2 cents.
Marco