Thank you very much for all your advice guys.
i bought a original MiniMoog last week !! 
The seller is the ORIGINAL OWNER and bought it brand new in 1980 in London, UK. My original upper limit was £3,500 but i decided to pay a bit extra extra and go for this one because it is in astounding condition, no modifications, been serviced by an expert, does not have Midi, comes with a flightcase, has had all the woodwork treated and waxed, and will not be being shipped in from abroard. The seller was a professional musician and happend to be the keyboard player with the UK band MUD !!
So once again, i thank you all for your advice.
Best,
Paul