Who do you use for merchant business accounts? What are the fees like?
If you are a small business owner, and just want to collect payments, have a look at both PayPal and Stripe. Neither of them have monthly charges, just a set percentage of the transaction, and both are easy to integrate into a website, especially if you use Wordpress to build your website, which you should do. :-)
All Australian banks charge a setup fee, plus a monthly fee regardless whether you actually make any sales or not, so I strongly recommend looking at Stripe in particular, but you may already have a PayPal account, and it is easy and free to upgrade it to a business account.