well yes i do know a bit about rolex but unfortunately prefer buying them from the dealer (hasslefree) but if i would ever buy a reowned watch i would definately contact japster
but one tip it is always important when the watch was last revisioned by rolex (should be done every 5-7 years) casue that can cost a lotta cash and if it was not revisioned then you have to add these costs on top.
i assume it is your first rolex so why not take the adventure to go to your nearest dealer and gett a brand new one with the dial you love (vor example a salmon one or white one etc)
rolex are investments and as good as cash. the problem with ebay is that you find a lot of frankenwatches (aftermarked added diamonds wrong bracelet for wrong id number wrong bezel fake dials etc) these can lead to problems with rolex as when you do get the watch revisioned you can they goodby to all parts that changed the id of the watch and rolex will put it back to the original status on your costs of course