Any Corolla SX (Hatch or Seca) or GTi will be manual and will have the 100kw 4AGE.
From memory the GTi replaced the SX hatch so will be newer in most cases, however the SX had some standard features such as power windows/mirrors that were only optional on the GTi.
I would expect to pay around $7k-$8k for a decent condition original GTi. Some will still sell for more to the right buyer if the car is immaculate.
Hope that helps a bit. I've been thinking about selling my GTi for quite some time now, but have decided to hang onto it a little bit longer.