What are some alternatives?
When comparing PriceDrops and Camelcamelcamel, you can also consider the following products
PriceSpy - PriceSpy helps you save money when shopping online.
Savelist - Found products you want but not ready to buy?
Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.
Waatcher - Automatically buy on Amazon at your target price
Reviewbox - E-commerce data tool to monitor customer reviews, track online pricing, optimize AMS tools, and more from Amazon, Walmart, and other major online retailers.
Jungle Scout - Amazon product research made easy.