That Is ridiculous and you should call MD back and insist on a refund.
How did they actually arrive would be also be of importance?
Was it express or good old ground or media mail?
Ask them to show you THEIR actual shipping cost!
My daughter is attending Alaska Pacific University and in Anchorage and we regularly send her stuff via USPS both regular and media mail and yes it is slightly more than mainland usa but $147 for 10 records?
Crazy and greedy.