I just checked out the UPS site. It's not going to be cheap. You are better off, though, properly declaring the package's value. You don't want a lot of trouble over a computer. I still think you're best option is to find someone you know/trust who lives in the U.S. and get them to hang onto it for you. That way you can take a quick day trip to go pick it up.
If you do end up shipping it, make sure all of the info and everything is correct. The value you declare may also have something to do with insurance. You don't want to lose you laptop and not get UPS to pay for the loses.
Good Luck, again.