Hi Gabriel,
I personally use a Audio-Technica AT2020 USB microphone and it was right around $100, maybe a little more, but the sound this thing produces is awesome! It is able to capture the lows, louds and highs with great clarity. I went for USB because of the ease of use… it was just plug and play and works great. Plus I didn’t have the money to get a better sound card and an interface for a regular dynamic mic.
You can actually see a review of the top 5 USB condenser here:
Top 5 Best USB Condenser Microphones for Recording
Hope this helps!