Hey there Gsk3!

These are all steel-framed bikes:

If you add another $200 to your budget, it could be oh so much better, but I've managed to scavenge a couple of models for you.

You could get the Schwinn Urban 3-speed Coffee bike, if you like:

www.schwinnbikes.com/bikes/urban/2012-coffee-3-speed-14287/

at $450, this appears to be a real bargain!

You could on the other hand, get the Willy 7 speed, if you like:

www.schwinnbikes.com/bikes/urban/2012-willy-7-speed-14665

at $440, this appears to be a real genuine bargain, as well!

- Slim

PS.

The most apt model not too far outside of your budget is the Giant Via1 for $600:

www.giant-bicycles.com/en-us/bikes/model/via/9017/48861/