you need to sell your car because now is the ripe time to get an optimum price. older the model, lower price.
that is first issue you must remember.
new Corolla, it is hard to believe its pick is slower than your model owing to it's shape because it is somewhat more aerodynamic. secondly it has vvti engine. these are my two cents. more technical people will soon be around to guide us both.
as far as high price is concerned, didn't you pay more than you would for a cheaper brand new GL of the Indus shape? 1.3l fully loaded GL back then was for something. new shape turned into Gli with same or worse stuff yet more price. current Glis have more to offer in terms of engine, braking, multi info display, and God knows vot else. you might like to check out yourself at:
http://www.toyota-indus.com/newcorolla/spec.aspx .
point is, with Toyota price increases with every model change.