Roblox Limited Sniper

function buy(){
    var id = 20573078;
    var price = 75;

    $.get('https://www.roblox.com/catalog/' + id, function(data){
        var html = $(data);
        var bestprice = $('#item-container', html).attr('data-expected-price');
        var sellerid = $('#item-container', html).attr('data-expected-seller-id');
        var productid = $('#item-container', html).attr('data-product-id');
        var userasset = $('#item-container', html).attr('data-lowest-private-sale-userasset-id');

        if(bestprice <= price){
            $.ajax({
              type: "POST",
              url: "https://www.roblox.com/API/Item.ashx?rqtype=purchase&productID=" + productid + "&expectedCurrency=1&expectedPrice=" + bestprice + "&expectedSellerId=" + sellerid + "&userAssetID=" + userasset
            });
            console.log("Item Found For " + bestprice);
        }
    }).promise().done(buy);
}

console.log("Bot Started.");
buy();