Shopping Cart + Payment Gateway Service Needed

I am doing some pro bono work for a not-for-profit club located in Sydney, which is struggling to avoid closure after some very serious recent mismanagement.

Club XYZ need to set up a shopping cart for selling tickets to attend dinner + screenings at Club XYZ of the Rugby World Club matches, which start in NZ on 9-sep-2011. They need the income from this to help get their head securely above water again.

We need to start selling $45 tickets and collecting money from members and visitors within 2-3 days max.

I have noted that iinet.net.au offers a shrink wrapped off-the-shelf shopping cart + payment gateway for $39 per month. See spec at

                                     http://www.iinet.net.au/business/shopping-cart

1) Has anyone used iinet's service and integrated it into a Drupal solution?

2) Do you know of any other shrink wrapped shopping cart service like this?

3) I was interested in seeing if there is a service that makes a fixed charge per sales transaction, as opposed to a fixed monthly fee, for example.

Thanks in advance for any help you can offer.

john.young@yindi.net