Should i buy brand new or pre owned?

[AB1990]

Im unsure if i should buy a brand new sub or look out on these fourms?

Will i make much of a saving buying a pre owned sub, and i want one that is no more than a couple of years old with all papers and box if i was to get a pre owned.

In my local ad there is a sub no date for £3350 if i pay cash what sort of price would i be looking to pay?

This will be my first rolex and ive decided on a sub because the SD feels to big and heavy on my small wrists and i love the sub.