Apple Watch Series 3, Apple Watch 4 and Apple Watch 5 are all available for purchase from retailers, including Target and Best Buy, and are currently on sale for $999 USD, $2,149 CAD, $3,299 AUD and $5,999 GBP.
The Apple Watch 3 Series is available for $1,299 USD, £1,449 CAD, €1,699 AUD and £1.99 GBP, and the Apple Watches 4 Series and 5 Series are available for £1-1,149 EUR, €2,199 AUD and €3,199 GBP respectively.