You don't have to spend a lot of money on one if you aren't concerned with high quality. However, the better the quality, the more professional your audio sounds. No one will listen to your podcasts ...

The HyperX Solocast USB Condenser Microphone is your trusty companion ... This is one of the best microphones for home ...

The most important aspect of any microphone is, of course, how it sounds. For the price point, the Genesis Radium 350D ...