Amazon with Music Factory Direct has the Prodipe POD3 2.0 Powered Speaker System (Black) for $50 with free shipping. Features 3" woofer, 1" tweeter, 30 watts of bi-amp dynamic power and USB to sync iPod with computer.
A 3" driver can be an acceptable midrange providing it has a surround that allows enough travel. It's not ideal, but I mean acceptable within the context of deliberately small and/or inexpensive speakers.
A 3" speker is not a woofer. It's not even a mid-range, except in a copywriter's wet dream. It's a tweeter. That makes two tweeters in one box.
http://www.amazon.com/dp/B002CHIZME
A 3" driver can be an acceptable midrange providing it has a surround that allows enough travel. It's not ideal, but I mean acceptable within the context of deliberately small and/or inexpensive speakers.