Sir Alex Ferguson insists he has cash to spend in the January transfer window – but he does not expect to find any bargains.With Manchester United in the middle of a defensive injury crisis, Sol Campbell’s name has been put forward as a potential solution.The mere fact a 35-year-old, whose enjoyed his best days at Arsenal four seasons ago, was being linked with a move to Old Trafford only served to fuel speculation about the money Ferguson has at his disposal.Critics of the Glazer family have never been scared of outlining their doomsday scenario for a club whose current debt stands at £790million, and are convinced the bulk of a world record £80million transfer fee received for Cristiano Ronaldo will go towards massive interest payments.It is a stance that is condemned forcibly by sources close to the owners, who have always claimed Ferguson has the money to spend and it is his decision alone to keep the bulk of it.And, in flattening any prospect of Campbell ending up at United, Ferguson has emphasised his view there is no value in players who might be available.“It has been said I do not have the money so I want to get someone…