Generally speaking, the best deals are offered during the big sales events each year. These include Prime day, Black Friday, Cyber Monday, and the back-to-school period, among others. You will typically see the lowest prices of the year for computers during these events. That being said, there are opportunities to find one-off sales on computers throughout the year from both first- and third-party vendors. These sales are much harder to predict and usually have a time limit, such as one day or one week. Realistically, the only way to find these sales is by checking vendor websites every day.