USPS will lose your package especially this time of year... i already had a $150 package lost in socal area earlier this month.
and this is not the first time. you'd think they would improve but people toss the ball back to me saying i haven't learned. lol
i would use fedex/ups not that there's any guarantee they wont loose it but better chance not having problems if well packaged.
considering they are about 60lbs each, i would estimate about $45-55 each with $2K insurance.