Um For the spawner... 1 Gold Blocks 2 Diamonds 6 Iron Ingots 2 Swiftness Potions (3:00 Mins) 1 Fire Resistance Potion (8:00 Mins) 5 Grass If You Want More Tell Me... But Yeh
Just buy a pig spawner and ask a donor 50+ to change it to a chicken spawner with the command: /spawner chicken. These items arent for you using them, but for selling them with provit xD
No it's not really that simple. It's not exactly profit.... There are not that many silked spawners any more so that is why they are worth more than regular ones. People like to keep them as since there aren't very many, it's something to kind of show off.
I know, what i mentioned to say is: you dont buy it to place it to use it as a chicken spawner, you buy it because its rare i didnt express myself that good sorry