If you feel like trying your luck, here are the lines for UFC 87.
Here is a basic course for how to read these numbers, based on a $100 system:
(-) is for the favorite
This reads that if you bet the amount after the (-) you will win $100
(+) is for the underdog
This reads that if you bet $100, you will win the amount after the (+)
You can bet as much or as little as you want and these sites will calculate what you can win. Good luck everybody!