Best place to sell tickets for Belgian GP?

[steve z]

I have 2 tickets for the Belgian GP this year.

They are 3 day (Fri-Sun) tickets seated in Gold 4 at Eau Rouge and cost me 700 Euros.

Due to family commitments I now can't go so need to sell. What website/forum would be the best place for this sort of thing?

I'm not looking to make a profit but would like to get my money back.