If the next one is a full set with no stretch in the bracelet, not overpolished (nice crisp lugs) - at the same money you should be fine (a good buy IMHO).
Got the pics and the details:
"box no papers circa 2003, small ding on the 3 o’clock lug, and a tiny mark on bezel"
At £4k you could put it through Rolex to get the green card and still have an ok buy.
YMMV
+8 sec after a day... I have a strong feeling it'll be the same with the other one as well, so maybe I really should just get that refund if I can't get the price down to at least £4.2k