$17 is an absurd price for a great USB mic, the Neat Bumblebee 2
High-quality microphones can be quite expensive - I recently reviewed SteelSeries' Alias mics which start at $180 - but you can still get a great mic for far less than you expect.
Case in point: you can get the excellent Neat Bumblebee 2 USB mic for $17 at Woot right now, using the code TECHELF to knock off an extra $3 off the list price of $20. This mic originally retailed for $100 and attracted strong reviews at that price point - but at $17, it's cheap enough to recommend to literally anyone that uses a computer.