How much would a new reconstruction apartment cost for a 34-pyeong unit in Mok-dong or Bundang?

Regarding remodeling, in Bundang's most expensive and least expensive areas, the expensive ones are around 2.7 to 3 billion KRW for a 34-pyeong unit near a station.
The cheapest ones ended up being around 2.2 billion KRW for a 34-pyeong unit (though even considering it's an old area, it will be cheaper than building a reconstruction in the same spot).
Since this isn't a reconstruction, I'm wondering exactly how much it would be.
In Mok-dong, since Yunseul Xi isn't a standard apartment complex, it should be cheaper than new builds in Mok-dong, but if there were a new build in Mok-dong, how many billion KRW would a 34-pyeong unit cost?
I just can't get a sense of it.