ALL things considered, Barcelona's financial intelligence seems... nonexistent.
July '10 = Buys David Villa (Spain's all time Goalscorer and one of the best strikers in the world) from Valencia for €40m
July '10-July '13 = Played out of position and following 2 unfortunate COLLISION injuries, price decreases drastically.
Jan '13 = Turn down offer of ~£11m for Villa
July '13 = Accept offer of £4.4m
o.0 WTF?
<http://www.fcbarcelona.com/football/first-team/detail/article/club-reach-deal-in-principal-to-sell-david-villa-to-atletico-madrid>
For a 5.000.000 Euro fee, Barcelona will retain 50% of Villa's rights. There has yet to be a personal agreement between Villa and Atletico, but the clubs have done their business. :)