sea butterfly's cost 1000 bells.
A peacock is not an obtainable animal. If you mean the peacock butterfly, about $2000 bells.
If your going to buy the surgeon fish... well you cany you have to catch it, but if your wondering how much you would get for selling it you would get 1'000 bells
From Tom Nook, 3,000 bells. A list of all the fish and their prices can be found here: http://accf.wikispaces.com/Fish
$39.99
On Animal Crossing, a 4-leaf clover sells for 80 bucks
It has not come out yet.
£22.70
The same here
8
15000 bells.
Currently, Animal Crossing City Folk costs between $17 an $25, depending on where you shop.
12 Gold Fish