I am setting up a shop online and I was wondering if I could get an authorize.net reseller with cheaper rates? But will that integrate with Magento, or do I need to get an account directly with authorize.net? Also, Do I need just the payment gateway, or do I need an internet merchant account as well? Thanks
You would need a merchant account to be able to use authorize.net. You can try e-onlinedata, they are an authorize.net reseller and they should help you get a merchant account.