to clarify......
Dimitar Berbatov agreed a 4 year contract in 2006
as part of that contract he also signed an agreement drawn up by the club that should the club wish to extend his contract at any time for a further 2 year period they could
if/when the club activate this extension this would be deemed as a NEW contract which the player would have to sign, however he has no choice because he has already signed an agreement to do so
there is NO concievable chance that Berba will ever be in a postion to buy out his contract with Spurs........NONE!!
sorry but this is a groundless suggestion