Well, he's still here. I stand corrected.
Yes, buy a smart charger. The wall-wart chargers that come with guns will rapidly kill your battery. And on a side note - most batteries that come with the gun from the factory blow and won't last. A good quality after-market battery and charger are strongly recommended.
As someone said above, airsoft is expensive to get into. You look at these $150 packages and thing "Wow! Great deal!" Then it doesn't take long to realize why it was so cheap in the first place, and you end up out shopping for something more expensive that you should have just bought in the first place.
On a side note, as expensive as you may think a $300 gun is, that's actually damn cheap. It wasn't but a few years ago that an entry level gun + battery + charger was over $500.