This Oral B Pro 300 is on sale at the moment, it's still selling around $76~$89 in other shops but only $45 on Amazon (50% off). They come in three different colours, but only Lavender and Mint colours are on sale.
However, the black one (credit to attalisie) is also on sale in Priceline at the moment for only $35.99, even a better deal if you preferred black colour. https://www.priceline.com.au/product/192989/oral-b-pro-300-e… (The Priceline offer has expired now.)
I think the lithium batteries start at the 1000, these cheaper ones are nickel batteries.