Mac Buyer's Guide - Recommendation on when to buy Apple products
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
The Mac Index - Compare Apple product prices in different countries
GlassIt.co - Find discounts, without invasion of your privacy. Download Glass It Price Tracker mobile app or browser extension 🇺🇸
Refurb.me - The smartest way to shop and monitor Apple refurbished products
Pricy - Amazon price watch