Given they will be meeting and greeting you. It is not local taxi rate, no, but then I always am concerned about just arriving with bags full of goodies and wallets full of dollars that you are a target for criminals. Personally, I'd pay the US$50 no problem.

__________________
There are two categories of travellers, those that experience a country and those that take their home with them wherever they go.

Be warned, as with any forum, picking a fight with the admin guy is not recommended!