Thank you for the advice,
I'm searching like every day many times a day for a good deal on ebay UK.
I've concluded what you've said: I have to save a few bucks and spend 600€ + shipping if I what something worthy. I'm little afraid because the brexit will be in the end of march and then the borders will close and probably if I want to buy something from UK I will pay taxes and I don't want that!
I'm trying to understand this Brompton world, what is the difference between the new and the older models? If you had to buy one, from what year would be?
Once again, thank you all for your help!