A good mk3 2.0 gti will cost between £2,000 and £3,000 in the uk. Which is roughly US$4,000 to US$6,000.
By the time you either have it shipped from the UK to Ukraine or come here and collect it i don't think you will save any money. And you will have a right hand drive car, which isn't ideal.
Like someone said earlier, it would be better to get one from germany where it will be cheaper and it's closer to Ukraine.
You will also find it very hard to convince people (like us) that you are a genuine buyer and not an ebay style scammer.