Marketplace
Solidly built plastic seat barstools, 75cm high seat, from an established office furniture supplier in Australia. Buro sells other stools and chairs for hundreds of dollars each. The stools come with a six year manufacturer warranty.
I've bought a couple of these and am satisfied with the strength and comfort. They're stackable, suitable for covered outdoor areas, and Catch delivered them fully assembled to Canberra within three days for $22 postage. This price may vary depending on your location.
Be careful with the height, these are 75cm high at the seat and suitable for typical bar tables and some breakfast bars. Other breakfast bars suit a 65cm stool, so measure up your space before you buy if you don't want to be hunched over your Corn Flakes.
I'm a fan of the Janinge bar stools from Ikea. Sadly, they are never on sale.