I remember  when you was lucky to get 3 to 3.5K per ore thats what i sold them for back in the days i made my first millions 

Yea but then you could make a natural mob spawner and gets all the moneys and itd be op

But then if they did add it the amount of money you could get from this would be so small it wouldnt be worth doing

Actually the netherworker gets payed for killing pigmen and ghasts. So i have a big natural farm for pigmen, though its never faster then smelting netherrack so in the end, i never actually use it now 

So i think the same applies for natural mob farms. If the pay is about the same as crafting a minecart, i doubt the spawnrates and killing-rate  to get payed will ever be faster then crafting minecarts at an iron farm.
Do remember that killing mobs from spawners doesnt work for pay, and the server is on normal where spawnrates are also lower.

jup its the new base we started working on

repeaters and comaritors.  i always run out of them, and they always need lots of stuff to make them again

hehehe there you go 

airplain (i'll need one to get to florida)

salty