OK... Salaries are generally lower in Croatia than in the United States, and tech prices are therefore relatively higher. Understood. Perhaps you simply need to recalibrate your expectations, then.
On the other hand, you speak of the 1520 as though it is within your price range, but is simply uncomfortable for you. A quick scan through these forums finds reviews of people who are happy with the 830 after having used their old 1520s. Isn't that good enough? Are you really such a slave to the written specs that you wouldn't move to the 830 for the sole reason that it doesn't seem good enough? I have a Lumia 928 which has appreciably "better" specs than does the 635 that my girlfriend owns. However, it honestly feels better than my phone in many ways, and I'm seriously considering buying one of my own as part of a switch to a different carrier, while I patiently wait for the 830 to become available. Specs be damned!