Why does estimateGas always return null or zero?

I am having some issue with the following... it might be my code or might simply be that the transactions require no gas?

They always return null or zero.

var gas = 0;
const eth = new Eth(web3.currentProvider);
const contract = new EthContract(eth);
const myContract= contract(abi);
var me = myContract.at(contractAddress);
eth.estimateGas({
        from: eth.accounts[0], 
        to: "0x0Fe18f369c7F34208922cAEBbd5d21E131E44692", 
        amount: web3.toWei(1, "ether")}, function(d){
        var gas = web3.toBigNumber(gas).toString();
        console.log(gas);                            
        if(gas.toString() != "null"){
                   gas = d; 
                    console.log("Gas: " + d);
       }
 });

Returns zero always... or null. Is this an error with my code? Or do these transactions require no gas?

The Web3 API uses error first style callbacks.

Your call should look like this:

eth.estimateGas({
    from: eth.accounts[0], 
    to: "0x0Fe18f369c7F34208922cAEBbd5d21E131E44692", 
    value: web3.toWei(1, "ether")
  }, 
  function(e, d) {
    var gas = web3.toBigNumber(gas).toString();
    console.log(gas);

    if (gas.toString() != "null") {
      gas = d; 
      console.log("Gas: " + d);
    }
 });