Samson makes some good USB Mics but they cost a bit more. They can be found used in your price range though.
The Zoom Video/Audio recorders are also good. They can be found used. They record onto an SD card and can be easily loaded to a computer via usb. They also can be used for podcasting.
I have both of the above products and they are great.
Here is a link to a vid that I recorded with my Zoom Q2 that I bought used for $120 USD. It came with the $40 accessary kit. I added a 16 GB SD Card for about $20 USD.
You can see and hear the quality.