Transfers in football are one of the craziest aspects of the modern global behemoth the sport has become. Before the days of the two transfer windows, transfers could be made any time during a season. With the advent of the transfer window, the rumor-mongering, speculation, and activity has been concentrated into 16 weeks of absolute madness. From the days of Giuseppe Savoldi becoming the first player to cost more than a million pounds in 1975, we have now come to a time when transfer records are dangerously close to the 100 million pound mark, having crossed the USD 100 million barrier a long time ago! This incredible rise has occurred due to the constant inflation and the influx of TV money into domestic leagues in the late 20th century. Transfers are also shrouded in the uncertainty regarding the amounts paid to external agencies, such as the player's agents, third-party ownerships, etc. This makes calculating the exact cost of a player quite difficult. According to a Forbes compilation, three transfers have exceeded the 100 million dollar mark when adjusted for inflation. Two of them were made in the same transfer window! Here are the costliest transfers in soccer history. The transfers have been listed according to their non-inflation-adjusted value in Euro, with non-inflation-adjusted values in USD provided in brackets. Real Madrid's dominance of this list is more a reflection on their owner Florentino Pérez than the club's traditional policy. Despite the inflated prices in the transfers in the second half of the 2000's and the first few years of the 2010's, the transfers of Zinedine Zidane and Luis Figo during the first galácticos era stand tall. The relatively recent boom caused by foreign investors in European football has caused the transfer fees to shoot up dramatically over the last few years, reflected in the fact that the world record has been broken three times in the last four years. Clubs such as Chelsea, Manchester City, Paris St. Germain, and Monaco are often criticized by soccer purists for their adverse influence on the development of young, homegrown players, and the irreversible upward trend of the transfer fees. Transfer windows can often be more engrossing than some soccer games! Transfer sagas such as those of Wayne Rooney, Gareth Bale, and Luis Suárez provide some spice to an action-starved fan's summer life. The excitement brought about by a new signing is one of the most primal feelings in the football world, as is the deep sorrow and anger caused by the departure of a fan favorite. Anticipation, excitement, joy, and sorrow all condensed within the span of a few weeks―such is the nature of the modern soccer transfer window.