Narco,
most airlines are imposing a 50 lb rule. And if memory serves me correctly, it costs $50 extra to ship an additional package up to 50lbs.
Most people I know put their stuff in a flight case and either carry on (if possible) or lock it up, box it up and use a major parcel service the day they leave for their destination (personally, I am a real fan of DHL over the other services... fast, and never had an issue with a package going missing or opened, plus they do not use contractors in my area, as opposed to FedEx)