Anyone needs to resell Eurotunnel pass?

Just trying my luck...
Anyone who has to resell a pass for a car through the Eurotunnel: outward Calais-Folkestone on Friday 27/12 morning , inwards Sunday 29/12 evening (before 7PM)?
On a tight budget, so looking for a deal. Else it will be with ferry :-/
>> jsh4m_at_hotmail_dot_com

Season's greetings!