I've only owned one Rolex, a Submariner. It gains about 4 minutes every 2 weeks. You would think an 8K watch could keep better time than a $15 Casio sports watch.
New rolexes are times to better than -2/+2 and everyone I’ve had in the last 3-4 years was spot on.Rolex did have to movement hiccups years back but all fixed.
Also used,no idea who owned before or if it’s been serviced and how it was treated.
New Rolex warranty is 5 years on movement.used to be 2 then they upped it cause their movements are awesome.