Enhance eBay with dark mode, compact view, delivery toggles, ad blocking, seller badges, keyword filters, and now local price tracking with change stats and item-page mini-charts. Built by Eliminater74.
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// ==UserScript==
// @name eBay UI Enhancer (Price Stats + Item Page Charts)
// @namespace https://greatest.deepsurf.us/users/Eliminater74
// @version 3.5
// @description Enhance eBay with dark mode, compact view, delivery toggles, ad blocking, seller badges, keyword filters, and now local price tracking with change stats and item-page mini-charts. Built by Eliminater74.
// @author Eliminater74
// @license MIT
// @match https://www.ebay.com/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
const SETTINGS_KEY = 'ebayEnhancerSettings';
const PRICE_CACHE_KEY = 'ebayPriceCache';
const defaultSettings = {
darkMode: false,
compactView: false,
showDelivery: true,
showUnitPrice: true,
hideAds: true,
highlightTopSellers: true,
keywordFilter: true,
showPriceStats: true
};
let settings = JSON.parse(localStorage.getItem(SETTINGS_KEY)) || defaultSettings;
let priceCache = JSON.parse(localStorage.getItem(PRICE_CACHE_KEY) || '{}');
const gear = document.createElement('div');
gear.innerHTML = '⚙️';
gear.id = 'ebay-enhancer-gear';
gear.title = 'eBay Enhancer Settings';
gear.style.left = '20px';
gear.style.top = '20px';
document.body.appendChild(gear);
const panel = document.createElement('div');
panel.id = 'ebay-enhancer-panel';
panel.innerHTML = `
<label><input type="checkbox" id="darkModeToggle"> Dark Mode</label><br>
<label><input type="checkbox" id="compactToggle"> Compact View</label><br>
<label><input type="checkbox" id="deliveryToggle"> Show Delivery Info</label><br>
<label><input type="checkbox" id="unitPriceToggle"> Show Unit Price</label><br>
<label><input type="checkbox" id="hideAdsToggle"> Hide Sponsored Items</label><br>
<label><input type="checkbox" id="highlightSellersToggle"> Highlight Top Rated Sellers</label><br>
<label><input type="checkbox" id="keywordFilterToggle"> Filter by Keywords</label><br>
<label><input type="checkbox" id="priceStatsToggle"> Show Price Change Stats</label>
`;
document.body.appendChild(panel);
panel.querySelectorAll('input[type="checkbox"]').forEach(input => {
const id = input.id;
const key = id.replace('Toggle', '');
input.checked = settings[key];
input.addEventListener('change', () => {
settings[key] = input.checked;
localStorage.setItem(SETTINGS_KEY, JSON.stringify(settings));
applyEnhancements();
});
});
gear.addEventListener('click', () => {
panel.style.display = panel.style.display === 'block' ? 'none' : 'block';
});
function applyEnhancements() {
document.body.classList.toggle('ebay-dark-mode', settings.darkMode);
document.body.classList.toggle('ebay-compact-mode', settings.compactView);
if (settings.hideAds) {
document.querySelectorAll('[data-testid="spnAd"], [aria-label="Sponsored"]').forEach(ad => ad.remove());
}
if (settings.highlightTopSellers) {
document.querySelectorAll('.s-item__etrs-text, .s-item__etrs-badge').forEach(el => {
el.style.backgroundColor = '#d4f7d4';
el.style.borderRadius = '4px';
el.style.padding = '2px 4px';
});
}
if (settings.keywordFilter) {
const blocked = ['broken', 'damaged', 'for parts'];
document.querySelectorAll('.s-item').forEach(item => {
const txt = item.innerText.toLowerCase();
if (blocked.some(term => txt.includes(term))) {
item.style.display = 'none';
}
});
}
if (settings.showPriceStats) {
document.querySelectorAll('.s-item').forEach(item => {
const title = item.querySelector('.s-item__title')?.innerText.trim();
const priceEl = item.querySelector('.s-item__price');
if (!title || !priceEl) return;
const priceText = priceEl.innerText.replace(/[^\d.]/g, '').trim();
const currentPrice = parseFloat(priceText);
if (isNaN(currentPrice)) return;
const key = title.toLowerCase();
const history = priceCache[key] || [];
const prev = history.at(-1);
let change = '';
if (prev && prev !== currentPrice) {
const diff = currentPrice - prev;
const pct = ((diff / prev) * 100).toFixed(1);
change = `<span style="color:${diff < 0 ? 'green' : 'red'}; font-size: 12px;">(${diff < 0 ? '▼' : '▲'} $${Math.abs(diff).toFixed(2)} / ${Math.abs(pct)}%)</span>`;
}
priceEl.innerHTML += ` <span class="price-change-tag">${change}</span>`;
if (!Array.isArray(history)) priceCache[key] = [];
if (priceCache[key].at(-1) !== currentPrice) {
priceCache[key].push(currentPrice);
if (priceCache[key].length > 10) priceCache[key].shift();
}
});
localStorage.setItem(PRICE_CACHE_KEY, JSON.stringify(priceCache));
}
// Handle product page separately
if (document.querySelector('#itemTitle')) {
const itemTitle = document.querySelector('#itemTitle')?.innerText.replace(/^Details about\s*/, '').trim();
const priceEl = document.querySelector('#prcIsum, .x-price-approx__price');
if (itemTitle && priceEl) {
const priceText = priceEl.innerText.replace(/[^\d.]/g, '').trim();
const currentPrice = parseFloat(priceText);
const key = itemTitle.toLowerCase();
if (!isNaN(currentPrice)) {
const history = priceCache[key] || [];
const last = history.at(-1);
let chart = '';
if (history.length > 1) {
const min = Math.min(...history);
const max = Math.max(...history);
const scale = n => Math.round(((n - min) / (max - min)) * 7);
const bars = ['▁','▂','▃','▄','▅','▆','▇','█'];
chart = history.map(p => bars[scale(p)]).join('');
}
const statsBox = document.createElement('div');
statsBox.innerHTML = `<div style="margin-top:6px;font-size:13px;">Price History: ${chart || '—'}<br><strong>Last Seen:</strong> $${last ?? '—'}<br><strong>Now:</strong> $${currentPrice}</div>`;
priceEl.parentElement.appendChild(statsBox);
if (!Array.isArray(history)) priceCache[key] = [];
if (priceCache[key].at(-1) !== currentPrice) {
priceCache[key].push(currentPrice);
if (priceCache[key].length > 10) priceCache[key].shift();
}
localStorage.setItem(PRICE_CACHE_KEY, JSON.stringify(priceCache));
}
}
}
}
applyEnhancements();
const style = document.createElement('style');
style.textContent = `
#ebay-enhancer-gear {
position: fixed;
font-size: 24px;
background: #333;
color: white;
padding: 6px 10px;
border-radius: 50%;
cursor: pointer;
z-index: 99999;
}
#ebay-enhancer-panel {
position: fixed;
left: 20px;
top: 60px;
background: #fff;
color: #000;
padding: 10px;
border-radius: 8px;
box-shadow: 0 0 10px rgba(0,0,0,0.3);
display: none;
z-index: 99999;
}
body.ebay-dark-mode {
background-color: #1e1e1e !important;
color: #ddd !important;
}
body.ebay-dark-mode a { color: #4ea3ff !important; }
body.ebay-compact-mode .s-item {
padding: 6px !important;
font-size: 14px !important;
}
.price-change-tag {
margin-left: 4px;
font-weight: bold;
}
`;
document.head.appendChild(style);
})();