Hi. I am using a S10+ and I love my phone. It has all the usual features, like a decent processor and battery. Fabulous display. Will be updated to Android 12 eventually and is very fast.
I have had mine since January 2020 and I am not regretting it or wanting to upgrade to a newer phone.
Where are you in the world? That will determine where you can get one from.
The S10+ still has a headphone jack and a heart rate monitor on the back. The cameras are pretty good and it has all the recent updates found on the newer 20 series of phones.
I think you would be very pleased with this phone.
Welcome to Android Central! The S10+ is a phenomenal phone and Samsung's UI is amazing! I use an S10 and am loving every minute of it! Like Kizzy said above, we also get the newest camera updates - Single Take mode is amazing!