Does not have to be new, used would be fine as long as in good condition, something you wouldn't mind using to defend YOUR home.
NOT HI-POINT!!! NOT TAURUS!!!
Did I mention NOT HI-POINT, NOT TAURUS?
Stick with a used Ruger, S&W, Glock, Springfield, CZ, FN or Baretta and you'll be fine. Another great used gun is the Sig Pro 2022. You can even buy them new for $400.
You need to change your mindset. Don't think of a $400 handgun as costing twice as much as a $200 handgun. The value of a $400 gun far exceeds the worth of its cheaper cousin. The $200 handgun is $200 for a reason.