Normally I'd advise against Blue mics but this is a really good deal.

Edit: audio technica AT2020 USB is on sale as well for $99:

http://www.amazon.com/dp/product/B001AS6OYC/

and for those of you who have a mixer, the XLR version is $80:

http://www.amazon.com/Audio-Technica-AT2020-Cardioid-Condenser-Microphone/dp/B0006H92QK/ref=sr_1_2?s=musical-instruments&ie=UTF8&qid=1417208180&sr=1-2&keywords=Audio-Technica+AT2020