Extravagant shipping charge


I purchased an item and already paid for the price.
The description says that the shipping cost will be determined later. I did not ask for the shipping before I made the payment. (Doh!)
The item weighs 55lb, and it is about 17x17x10 size. The shipping box will be about 20x20x15, and the total weight would be close to 60 lb.
For UPS shipping from Arizona to Michigan, the seller wants $150 for the shipping. When I calculated UPS shipping, it is less than $60. Obviously, the seller is trying to make a huge profit from shipping.
Any suggestion to how to deal with this situation?

Thanks.

128x128ihcho
The item is $150. So, the insurance will be just a few more dollars.
I already contacted the seller that the shipping charge is much more than I expected. Waiting for a response. 
Thanks for your responses.
Why aren't you discussing this with the seller instead of posting here?  Maybe he has to drive a long distance to get it to the shipper, or he's paying extra to have it picked up, or he's paying to have it professionally packed.  Maybe it's the insurance.  Maybe it's something else.  Maybe you're getting ripped off.  It's all guessing.
Some UPS stores charge a huge premium over UPS rates.  Most just mark up a little, but I've seen some ridiculous charges.  They also charge a ton for packing.  
As posted above, please discuss the shipping costs with the shipper.

Is it possible the $150 includes the packing, the materials, insurance and the UPS shipping cost?

Since the item weighs 55lb, and it is about 17x17x10 size, The shipping box will be about 20x20x15, and the total weight would be close to 60 lbs., I recommend you have the shipper double box the package.

I always double box my audio equipment to ensure it arrives in one piece. This is the best insurance there is to ensure safe arrival. And, sometimes I even triple box depending on the size, weigh and value.
$150 shipping charge on a $150 item is ridiculous. The seller is screwing you!