It looks very rusty with missing parts (tailstock quill, tool holder). I'd guess the ways are pitted or will be when you get under the rust, along with the main spindle chuck.
If rust has found its way into the motor and electrics it may be somewhat hazardous to attempt to power on without a major clean-up.
I have no idea of pricing where you are but 400 euros sounds like a lot for a what it looks like.
What's the going price of scrap metal per kg - guessing it weighs about 400-500 kg?; that may be more than what it's worth - maybe?
Personally, I'd leave it where it is unless I was looking for some hard to find parts that _might_ be refurbishable :-)