This phone is expensive all around the world. I just think when we buy a samsung phone we´re not buying only the hardware. Loving or hating touchwiz, it´s a brilliant piece of software and they put a price on it.
Like you, I tried to find somewhere this phone with a cheaper price, and no success. I sold my s3 and bought this mini beauty. Most of the price we pay for s4 mini is because of all features touchwiz provides. I get angry with the bloatware consuming hardware as most of ppl, but we can´t deny they did a good work on it. U won´t regret trading your S3 for an S4 mini, only if you don´t get used to the smaller screen.