Taxi from amsterdam airport to amsterdam central?

Any one have any ideas on how much a taxi from the airport to central costs?

I tried it last year with some friends... It was 40 Euros, which was fine since we split it 4 ways, but if its just you, then I would recommend taking a train instead. Trains leave regularly from the Airport to Amsterdam Central Station. More info here:
http://www.amsterdam.info/airport/train/