It's 43lbs, figure +3lbs. for packaging also since it's going to need a lot of cardboard. The cheapest method is $162.65 not including insurance (although I think it gets around $100 insurance for free anyway), as shown here:
http://pe.usps.com/text/Imm/fh_014.htm#ep3576772
I'm not going any lower on the price to package this for International, it's going to take some time to package properly. I also will not accept a Regular PayPal payment for International.
Anyway, I'd say $650 if you can figure out a way to pay me that doesn't cost me anything.