prepaid international phone cards

hello,
would like to know if anyone can suggest me a source selling international phone cards, the ones that goes through VoIP. thanks

 

What sort of volume?

 

think about a starting small volume, to check if this market idea is good.

 

people you want to deal w. are a subsidiary of IDT. They are in northern New Jersey for their home office.

 

will i be able to resell worldwide phone cards?
(i'm not in USA, i want to resell those cards for people in every part of the world so they need toll-free or local numbers to access the service)

what's their contact?
thanks

 

http://www.idt.net/

Dig through their site.

 

thanks for the link!