Before you know it you have a truck load of multimeters lying around. They're just indispensable but they're also very cool gadgets. And it doesn't help that AliExpress sells very decent ones for cheap.

My main multimeter at the moment because it basically measures about anything. And it set me back a whopping €11 on AliExpress. Don't expect stellar precision though from this unit.

A must have for measuring FET's, transistors and diodes.