Mashable's Shopping team has been covering Amazon Prime Day since 2018, and this year, we've got our work cut out for us. The retail giant just announced that it's extending its flagship members-only sale to four days for 2025.

Save $100 on this 5-inch telescope and enjoy views of Saturn's rings, the belts of Jupiter and bright deep space objects like the Orion nebula and Andromeda galaxy. The 5SE is a great middle-ground between the portability of the 4SE and the optical power of the 6SE.

The most popular stores, like Walmart and Target, are holding their own competitor sales during Prime Day. Here are all the sales to check out