ConElPueblo
·Here is a chart from omegaseamaster300.com with estimates for head-only examples:
To me, £5K seems pretty fair for this example - while the bezel has some wear on it and @ConElPueblo notes some polishing on the case, it still looks like a "correct" example with the right bezel, correct hands, no relume, and an extract of the archives. The seller properly notes in the description the crown is a service replacement, but that doesn't bother me.
Is that chart based on general market observation or is it on dealer sales/private sales/auction results? Also, the "up to £5-7K" is worth noting. To me that signifies that in order to reach that amount some other factors such as the right buyer on the right platform for the watch need to be present.
We can debate endlessly on what constitutes "poor/good/excellent condition", but to me the dial on this particular one is lovely, the hands good, but case is worn and polished and the bezel is not only cracked it has also been damaged by moisture. The marks on the case back aren't good either.
To me it seems like one of those cases where a dealer - or a private enthusiast for that matter - could match it with a similar watch with a good case and bezel, but poor dial/hands and swap the parts to make one GREAT watch and one poor watch instead of having two mediocre examples.
That said - if the seller (Mr. Brewer?) is indeed well versed in Seamaster 300s as @mr_yossarian says it is most likely priced well and will be sold soon. Probably not to a hardcore collector, but to someone less picky.
Good advert, btw. Apart from showing the watch on a bracelet that doesn't come with the watch, it is free of the usual rubbish. I am sure whoever buys it will be happy 😀