I am trying to find the ideal service (secure & reliable, easy to use and understand, not too expensive comissions, allow to design payment pages like the original website) to allow a small business to charge customers from all over the world for the products it sells online.

I have so far never worked with such services, so I am interested in recommendations, advices and of course warnings.

Thanks

That is what we are talking about.
Top 15 3rd Party Credit Card Processors Challenge 2005
http://www.webhostingtalk.com/showthread.php?s=&threadid=364540

What country are you based in okok?

I think the business is registered in Israel, but the customers are from all over the world.

okok,

Yes, depending on the type of product sold and the monthly volume, third party processing might be your best solution. And having the payment page integrate with the websites logo etc should be an easy task for most of them.