My band is looking to get a PA for our singer to use at practice so we can hear him. We only need to mic up his vocals and nothing else. I was told I'll need something around 500 watts to play over a guitar, bass and drummer. I was looking at this one on craigslist and it seems like it should be able to do what we need it to.
I've also seen used Fender Passport 500's for really good prices and this for $700.

I was wondering what would be the best choice, not necessarily out of those 3, but somewhere in that price range.