I've been buying ink from Inkjet Wholesale for 8 years, that I know of. Their website is easy to use, your cart order is saved - invaluable if you have inconsistent internet - and the order confirmation, dispatch and delivery emails keep you updated on your order. I've changed addresses a few times, I've always lived in rural NSW, and the delivery has always been 3 working days without fail. Receiving customer service like this is why I am a long term returning customer.

Approximate cost: $80