Hi Robin,    
 
  What Olie says about Behringer.  Hate to talk bad, but I tried to 'cheap out' a couple of years ago and went through through three of their powered mixers in about two months, the last which died on a gig.  Granted I've seen a few that seem to be bullet proof, but that's the exception based on my experience.  Then there's their supposed 'power ratings'.  I have no idea how they calculated their watts per channel, but overly optimistic is an understatement.  
 
  Buyer beware.  
 
  Best Regards,
 
  Kimberly  

I would stay away from Behringer new or used for all of the reasons stated and then some. You are better off spending a little more for true Pro audio. Keep in mind the old adage, buy once, cry once.  
 
Why don't you give us an idea of your budget and maybe folks can be more specific.  
 
Keith

well! This is precisely why I love this forum. Thanks for the advice, everyone!

keith, another one of my favorites is buy cheap, buy twice. good advice to keep in mind/

Behringer:  the Yugo of sound equipment.
 
Bill, tgo

We have a couple Bose PS-1's for our backline.  They work kick ass but are not a wallet friendly purchase.  
 
No like Behringer, heap bad medicine.  
 
Roger (TTK)