If you are a fan of motorcycle racing, don’t miss the first presale period of tickets to the Cardion ab Grand Prix 2009 (held on 8/16 at Automotodrom Brno, aka Masaryk Circuit or Masarykring).
Until 2/28, the tickets for the whole racing weekend can be bought for the lowest possible prices. A great place on the finishing straight is worth €100, low-budget ticket to the banked areas is worth €42. I think the most interesting thing is it the price of a junior card for kids born between 1995 and 2002, which is only €7.
Check the complete price list (the tickets can be ordered online at the same site) and a detailed map of the circuit.