I think that 1000 euro is way too high, but if it doesn't sell maybe you can make him an offer. 600-700 euro seem a fair price to me, and I don't think there are many people out there interested in valley green.
Once you buy them, you can store them safely for the future and continue using your bike as it is, for fear of damaging that mint tank and sidecovers... HAHAHAHAHA
Raul