According to the Observer newspaper the circuits charge the folowing for what I assume are 3 day Grandstand passes
Melbourne £ 310
Sepang £ 204
Interlagos £ 300
Imola £ 504
Spain £ 237

A1-ring £ 235
Monaco £ 850

Montreal £ 179
Nurburgring £ 311
Magny Cours £ 203
Silverstone £ 312


Hockenheim £ 204
Hungaroring £ 270
Spa £ 190
Monxa £ 511
Indianapolis £ 130


Suzuka £ 450
Spain didn't cost us that much, We paid about £180, but I know that Silverstone is about right (that's partly why we went to Spain!!). This isn't very helpful, as you may imagine. I have checked out some of the circuits but they aren't selling/advertising their tickets yet for next year yet.
Can anybody let me know how much they have had to pay for tickets this year? As acurate information would be helpful.