Who might buy your microchips?

If you salvaged it from broken electronics or stuff, you could sell it back from the company you stripped the electronic from (For Example DELL, Toshiba, Apple, and many more.

Or if you just stripped some random mircochips, then i guess put it on the market, see if any companies/Stores who would like to buy them (Warning: They will buy it cheap)

Hope This Helps