It will also come with the original box, and USB-C cable (cable is new and unused). Note that these newer phones no longer come with the wall outlet charging adapters itself, as the manufacture saves cost and e-waste.
This phone has had the screen replaced which results in a unique original Phantom Gray backing with a Gold Frame that is normally found on the other color variants. This is considered a "Tuxedo" by the industry, normally frowned upon by the manufactures as it goes against their known color palette decisions.
With this purchase, included is a Spigen phone case, and existing applied screen protector for both the front screen and camera array. The case and screen protector does have some wear and scratches which can be seen in pictures (such as the bottom right), and all of which can be replaced by you shortly after receiving the phone if you feel the need.
All my phones receive a screen protector and case immediately once unboxed, so you can expect a completely unscratched screen under the screen protector.
I have also cleaned & sanitized the phone and case with disinfectant & alcohol. So you can expect no grime, dirt, or smudges.
With all the above, feel at ease that you are buying the most well taken care of used Samsung S21 phone that you can get without buy brand new in box one.