If you're shopping on Amazon Prime Day, you want to know that the deal you're looking at is worthwhile. That's why we did the work for you and researched top-rated products that are at their lowest price of the year.How did we find these items? There are price tracking tools online that can help you determine if the Prime Day deal you're seeing is good, and even sometimes the best price ever seen.A popular price tracking tool for Amazon products is CamelCamelCamel. All you need is the link to the product's Amazon page and the site will show you a price history chart. For example, let's look at the AncestryDNA kit. When we put it in CamelCamelCamel, it showed that the lowest ever price was recorded during Black Friday weekend three years ago. During Prime Day, the kit is even lower, priced at $39, showing us that the Prime Day deal offers the lowest price the item has ever seen. Price trackers like CamelCamelCamel, Honey and Fakespot will help you not only ensure what you're seeing is legitimate, but also how good this year's Prime Day deal on an item you've been watching really is. Take 50% off the iRobot Roomba s9+ self-emptying robot vacuum.Save nearly $500 on the Samsung 4K The Frame 65-inch TV with a white bezel.Save $340 on the roborock Q7 Max robot vacuum and mop combo. Save nearly $200 on the Dyson V15 Detect+ cordless vacuum cleaner.Save $160 on the Blink Outdoor 4 wire-free smart security camera system. Save $100 on the Philips Barista Brew semi-automatic espresso machine. Save $100 on the Oral-B Genius X rechargeable electric toothbrush. Save $80 on the AncestryDNA genetic test kit.Save $80 on the Coway Airmega HEPA air purifier with air quality monitoring. Save about $70 on the Rubbermaid airtight food storage containers (Set of 20). Save about $50 on the Oura Ring Gen3 Horizon smart ring.Save about $35 on the MAGNA-TILES classic 100-piece magnetic construction set.Save about $10 on the CeraVe hydrating skin care set.