I'd definately pay good money to see:
ex-F1 Drivers/Managers:
Karl Wendlinger
Eddie Irvine
Damon Hill
Jean Alesi
Jos Verstappen
Alain Prost
Ukyo Katayama
Shinji Nakano
Olivier Panis
Pedro De La Rosa
Nigel Mansell
Mika Salo
Mika Hakkenen
Takuma Sato
Johnny Herbet
Eddie Jordan
Heinz hearald Frentzen
Alex Wurz
Takagi (ex Arrows driver)
Ralf Schumacher
Personally i'd pay £10 each for these don't know about anyone else
Current Drivers:
Adrian Sutil, Sebastien Vettel
Mark Webber, Mark Webber
Jensen Button, Nico Rosberg
Kazuki Nakajima, Timo Glock
don't know what i'd pay for those, would be surprised if they turned up as i'm sure a lot of these would be difficult if not impossible to attract