Hi Fredrik,
Welcome to the Dark Side
As far as I know, there isn't lots of Countach for sale in Europe at the moment, but Raymond might be up to date and may give you more info.
A Classic Lamborghini is like a box of chocolate...you never know what you gonna get
However, most of the cars in Europe have a known history, and if you find one, check the VIN, and we will probably be able to tell you if it's a reasonnably good car or just a poor thing you will have to rebuild.
In any case, don't even think of buying a perfect car right away. A Countach QV known to be a good car in Germany would cost you 110k/150k euros. Prices are going up fast, so don't think to much and go for it !
Well maintain, a Countach is almost reliable, but needs a lot of care. Buying a good care doesn't mean you will not have to go for a complete "check up" and regular maintenance. If you want to know a good mechanic for a good price, there is one in switzerland. Not a fancy garage, but the guy is a genious (ref to the never ending threads about Raymond's or my car).
Anyway, good luck ! Keep us posted
Cheers