At the very least, I would get watch with warranty certificate/card.
Box, manuals and tags can usually be sourced.
Why must have original warranty certificate/card?
1) Higher resale value
2) Easier to find buyer
Also, when it comes with the certificate or card, it is less likely to be stolen goods.
I will always make sure preowned watches are bought through legit sources. It the deal is too good to be true; it is usually not true.
Sent from my EVA-L19 using Tapatalk