Question Function Returns undefined

[checkmate35]

var api = require('steam-price-api');

var colors = require('colors');

//"Exalted Manifold Paradox"

var iname ="Inscribed Blades of Voth Domosh";


item_price =function(item_name){

	var result;

	api.getprice(570,item_name,function(err, data){

		var price = data.body.lowest_price;

		var valid = price.replace(" ","").replace("TL","").replace(",",".");

		var last= parseFloat(valid.split(" ")[0]);



	console.log(last);

	//return last;

},17)	

}


console.log(item_price(iname));