I have used the German website of Avis. It does not ask you for the country of residence, but for Manhattan it gives you half the price of the US site. I did enter my US Wizard number with my US address, no problem. Now one smart?!?!?? agent in Manhattan has told me I can not do it anymore, and actually put a note into my profile not to accept a booking for Manhattan on the German website. I am pretty upset about this. Not only do I have to pay now double, but I do not see what I did do wrong. If Avis can not control their own system, then this should really not be my problem. But I think I found the trick: I will book without the Wizard number. Then it asks you for your address, and even though I enter a US address I still save my 50% over these rip-off Manhattan prices - until the next "smart" agent comes up