Yes Pierre, you can use a trusty and very common mic like the shure sm57 with a computer line adapter (this mic is around $100) There is nothing better for less than that.

There are also more choices that are more geared for computer recording (condenser mics) which might give you a warmer sound than the shure’s.

A great choice also is the Apogee Mic which was created specifically for computer recording. Apogee makes more high end products which sound really good. This mic is a little more than the 2 I already mentioned but probably the best sounding. I’ve had other Apogee products and know the qual;ty but unfortunately I’ve never tried this mic.

Check em out here:
http://yourhomerecordingstudio.com/best-recording-microphone
http://yourhomerecordingstudio.com/apogee-mic