Prices rise and fall in predictable patterns each year for all kinds of items. By making purchases at the time of year when prices are historically low and selling items when prices are historically high, you will continually pile up financial gains.
People that are financially aware routinely use price seasonality to their advantage. People unaware of price patterns are unknowing financial victims of these prices. For example, I know two colleagues that bought convertible cars last year. One bought a car when he wanted one, in June when convertible prices are near their price high for the year, the other patiently waited until winter. He said during the first two weeks of January, convertibles are 17% cheaper than during the summer and buying at this time saved him nearly $6,000 on the price of his car. Did you save 17% on your last car purchase or make an extra 17% when you sold it?
Many cheaper items also have price seasonality, for example you can save 70% on Christmas cards when buying in mid January; you can save 50% off your bathing suit buying it after Memorial Day in the fall; and you can save 30% on bicycles in September.
The same price seasonality applies to selling valuable item that you own, when the savings can be a significant amount of money. For example, your cars, homes, jewelry, and other pricey items. For a simple example, a neighbor buys a pig to be raised at a farm for slaughter once a year. Instead of buying at the March price peak like everyone else does, he buys in November at the seasonal low and sometimes sells the pig in March at the price peak for an extra profit.
Most items have price seasonality and financially literate people use these price points to their advantage on both buying and selling items.