Flight to Munich - Champions League Final ?

I have a return flight ticket for Munich available for the weekend of the Champions League Final. The outbound flight leaves London Heathrow at 7am on the Saturday landing in Munich at9.50. The return leaves Munich at 5.30pm on the Sunday and returns to Heathrow at 7.30. Both flights are with Lufthansa…I was meant to be attending the Final myself but can now no longer make it. The flight cost £145 at the time…it is available for £450.