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.
then please tell me this purchase wasn't too bad. http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270544451007&ssPageName=STRK:MEWAX:IT
@drøn started
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then please tell me this purchase wasn't too bad. http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270544451007&ssPageName=STRK:MEWAX:IT