What's your budget when in terms of "cheap" as overhead tripods can be quite expensive. I've looked into it a bit more an a "C stand" tripod. Depending on how heavy your camera is, if you're using a webcam, you can also use a desk mounted microphone arm which cost about $20 depending on the brand and quality. A C stand or a mic arm will be your best option. A regular tripod will get in the way