A Galaxy S20 5G dual SIM (with an International/European part number SM-G981B/DS) in "very good condition" as advertised and paid just over €300: I'm really happy!
When you consider that this model was sold new for just over €1,000, that's great.
In detail: no scratches, no traces of impact, perfect screen, glass back too. I've been using it for 1 week and haven't noticed any problems. Good 5G reception, GPS, audio, camera, super-fast interface, everything works perfectly. It's a nice change from my Galaxy S7.
I don't have a box, I use the phone's connection sharing to give my computer, TV, etc. access to the internet. Well, 5G really is faster! Internet browsing from my computer is amazing.
Given the perfect condition of the phone (it looks like it's NEW!), I'd like to recommend the refurbisher NLR (near Montpellier).
Well, there's always a 'good': the battery life is a bit short, but that's OK (there's another 'good', but it's a good 'good' :-)), nothing surprising for this Samsung model, and it's not a problem as it charges very quickly. And hey... 300 € only!
Thanks for that!