shaun, i've bought 3 guitars in the last 3 years from the uk and had them all shipped to france.(ups,fed x,dhl)
it's been about 100quid fully insured(1000) from a private vendor or 40quid from a dealer.
they all arrive safe and well, as does just about anything posted from uk to france.
hard case is well advised. do remember that people from france buy in the uk because it's still cheaper
even with 10% or so for p&p.
e bay france is cr@p for used guitars, little choice and ambitious prices.
i'll try the cheaper options posted above next time