You've never used Android 4.3 on 512 MB of RAM, right? I have and it is unusable. The base OS and the base apps, like the stock Android browser do run, but nothing is left for other apps. A minimum of 1024MB is needed.
Also that phone is $100 in the US. To get the price in EU or most other markets multiply with an amount between 1.5 and 2
Also that phone is $100 in the US. To get the price in EU or most other markets multiply with an amount between 1.5 and 2