What are some alternatives?
When comparing Shopods and PriceDrops, you can also consider the following products
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
PriceSpy - PriceSpy helps you save money when shopping online.
Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.
PriceAlarm.net - Quick price comparison in all Amazon and eBay shops. Price History and Price Tracker inclusive.
Penny Parrot - Get price drop alerts for products on Amazon as well as historical pricing to find the best deals.
Waatcher - Automatically buy on Amazon at your target price