What month is the cheapest when buying a bike? Autumn and winter are considered the cheapest to buy a bike as there are typically a lot of seasonal and holiday deals around this time of year. As well as the holiday sales, as spring and summer roll around, many older models may go on sale to make way for the newer models. Which is the best budget-friendly bike? Our sale offers a wide range of great budget-friendly options, but if you're looking for maximum value then we recommended options from the Scott sale, with some of our biggest savings and ensured performance and quality.