I am selling my very nice series 5 in space black stainless steel. I have used it everyday for almost three years but it is in very very good condition: no signs on the screen and no signs on the body; it is probably less shiny than a brand new one due to inevitable micro scuffs.
Battery health is 82%.
It has cellular of course.
The Milanese loop is in good conditions: no discolouration or scratches but one may see it has been used.
All is functional. Updated to watchOS 10.6.1.
It comes with original box both for watch and Milanese loop.
The series number of the watch differ from box to watch: the reason is that I bought the watch in 2019 but in 2021 I received a new one (or refurbished, don’t know, but it looked as new) via AppleCare+. So, despite being a 5 year old model, this specific hardware has been used for 3 years.

Of course the watch will be delivered resetted and logged out from iCloud and FindMy services.
Charger in working conditions yet with signs of use is also delivered (cable and puck are intact, just signs of use).