Jer, what is this PA for? Inexpensive may risk quality.
Here's an example...
My PA 150W Fender = $400 (I think it's been years)
Yamaha 300x2 PA = $800
My PA is okay for two man acoustic shows with vocals. But it is not okay for a band to do shows and could not power monitors.
My old bandmates Yamaha was great for rehearsals, shows, powered monitors and was awesome.
You really get what you pay for. If you need a PA I'd suggest paying around $1000 for the Yamaha package that you can find at www.Musiciansfriend.com
since it comes with a board, mains, all cables and a few mics. Now the mics aren't that great but it is an easy upgrade later and you can keep the old ones as spares or use them as instrument mics if you need just a bit of soudn reinforcemnt.