I have a 7kg box like that
My company dumped a lot of outdated/expired parts (Yes, to comply ISO-something, parts have expire date) and I took it. Most is pretty old and useless, but I've found F-RAMs and other little interesting ICs.
Sadly the mcus are very old nothing interesting.
So now you can make your fortune on ebay.
You can sell TI TPI6300X buck boost converter for 50-100 CNY or more in China.