Seriously I don't know about your laws but it's probably best to check it out with a local forum or maybe even Arnies Airsoft since they're at least on the right continent.
That being said if you do find out that you're not allowed metal bodies, word is that there are some plastic bodied GBBR's in the works.
Also I guess it depends on your budget I mean you can get one for $500 USD or $1500 USD. So the cheapest you'd be looking at is probably 300 Euro new. Maybe check around your local team forums to see if anyone is selling their GBBR, you could probably snag one for a bit cheaper that way.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE