What time is it? Watches and horology

and now I've fallen in love with this:

there's one on the bay at the moment, but it seems a bit expensive (bin 150 pounds)
what do you guys reckon I should offer? and do anyone know of an alternative to ebay to get this watch cheap - I don't mind a reasonable amount of wear...

I'd say £150 was entirely reasonable. Google the model and take a look at vintage watch dealers and see what they go for on the retail market.