As above there’s a 600 spring drive diver on C24 for £1800, seems cheap.

Various MM300 at around 2k or even £2800 new

And the GS spring drive 2nd hand around 4k

Is there a huge variance in quality, and is that Spring 600 too cheap it seems a great price?

I am no seiko expert but the case sizes and quality and indeed the fact it’s not a ‘usual brand’ interests me greatly

Any advice gratefully recieved….. is the 2k extra worth if for the GS they really aren’t about in the used marketplace….