Xfed, how do you see this as reasonable? I've done this trip by taxi on numerous occasions, as well as taxi and rental car and yacht for that matter, and it is generally about 70-75 Euros in a taxi. There is actually a taxi window around the corner at NCE airport where one can buy an actual voucher for 65 Euros (but the drivers absolutely hate you when you use them). Limousine (generally use Mercs much the same as taxis) companies that regularly do transfers charge 40 Euros and as stated above the chopper costs 70 Euros (I think its 120 R/T), not to mention that the chopper company (Heli-Air Monaco) shuttles you to anywhere you need to go in the principality as well.

Hell if you have the time you could do bus to train and it'll set you back under 7 Euros