Refill Prices...

Refill, prices are ridiculus IMHO.

Iron goes for 80gc 1k.
At best buffed, this becomes 2K, which is exactred over the course of lets say 2 days.
Reallistically, it becomes with buffs 1800, which means almost 17gc per stack, you can almost buy that ready for that price and have it instantly, without the cost of the buff (yes it costs too or the time it needs) (it is around 20gc/stack to buy it from trade)

Otherwise, you could just build the iron mine itself, which gives 550iron, and its cost in materials with a lvl 2 upgrd is, i would say 20-25gc.
40-50gc for 2 iron mines (1100)
against 80gc for 1 iron mine (1000)
Extraction time (since it is 2 iron mines lvl 2 against one, should be the same).

It saves what? 2 geologist every second day, or the 10minutes it needs to rebuild the time?

Totally not worth it, imo.