Carl - checked with the Airport Director and The Customs Boss at Odessa Airport - the answer is as follows:
With 9999 Euro a citizen from any country does not need to make a declaration either bringing it in or out of Ukraine. 10000 Euro will require the declaration. To clarify, I did ask relating to Sterling and USD - it is the sum equvilant to 9999 Euro which will not require declaration.........just have to make sure you do not get caught by an exchange rate issue if not in Euro I guess.

If you want to check yourself - the phone number for "General Customs Enquiries" at Odessa Airport is +380482393470. Obviously I don't want to publish the mobiles of the above mentioned but that is the number they gave me for the benefit of those on the forum.

Posted the same answer in your other thread about this matter too mate.