Garmin 235 was at this price in December, but if you're still looking, old design but still solid, includes HR monitoring.
Also, Fenix 5 at [$549] (ends 27/1) (https://www.rebelsport.com.au/p/garmin-fenix-5-gps-heart-rat…)
Garmin 735XT at $349
Garmin 645 Music Watch at $499
Garmin Vivofit 4 at $99
Garmin 5S Sapphire $699
The Forerunner 235 is still a great watch. Bought 2 last Christmas for about $235 from memory (half RRP), and I am surprised the price hasn't really come down further than this since - they must have had a LOT of stock in the Garmin warehouse….
Just be sure to get yourself a tempered glass screen protector off eBay - I've gone through a few of them but no damage to my actual watch face.