Untitled

// ==UserScript==

// @name         Neopets Classic Auto Smart Haggle
// @include      https://neopetsclassic.com/buyitem/*
// ==/UserScript==

String.prototype.repeat = function(times) {
   return (new Array(times + 1)).join(this);
};

function smart_haggle(price){
    return price.substring(0,2).repeat(price.length).substring(0,price.length);
}

    let wont = "I won't take less than ";
    let regwont = /I won't take less than (.*) Neopoints/;
    let separator = ",";

if(document.body.innerHTML.indexOf(wont) > -1){
    let haggle = document.body.innerHTML.match(regwont);
    document.getElementsByName("offer_amount")[0].value = smart_haggle(haggle[1].replace(separator,"").trim());
}