Reddit mentions of Pro Lavalier Lapel Microphone JK MIC-J 016 for VOIP SKYPE PC Laptop Computer Voice Amplifier Notebook - Omni Condenser Voice Recording Microphone

/u/energelrayban - if you don't mind syncing your audio in post, a Zoom H1 will give you good quality audio.

If budget permits, I recommend you get a decent lavalier to go along with it. You should be able to put your setup together for less than $200CDN:

• [Zoom H1 recorder - $124.75CDN] (http://www.amazon.ca/gp/product/B003QKBVYK/ref=as_li_ss_tl?ie=UTF8&camp=15121&creative=390961&creativeASIN=B003QKBVYK&linkCode=as2&tag=hybrcamerevo-20)
  
  
• [JK MIC-J 016 Lav Mic -$38CDN] (http://www.amazon.ca/gp/product/B00AYR3K3I/ref=as_li_ss_tl?ie=UTF8&camp=15121&creative=390961&creativeASIN=B00AYR3K3I&linkCode=as2&tag=hybrcamerevo-20)
  
  Put the recorder in your pocket and clip the mic to your shirt or lapel and you'll be all set.
  
  Hope this is helpful and good luck with your audio upgrade!
  

You might want to look into a lavalier mic, as most desktop microphones will have to be reasonably close to your mouth for proper sound reproduction.

A quick Google pulled up this, which probably won't sound as good as a desktop mic but is cheap enough that you don't have to feel guilty trying it out.