I don't understand that. I just Fed Ex shipped a guitar in a hardshell case, insured for $1,700 and it was only $29. Pretty heavy box, too. My shipments rarely exceed $35, even across the country and insured.
Bummer about you not shipping. I've been really interested in that PRS you are selling, but I'm in NM and I read the part where you said you won't ship.
I have used both and have paid up to $50 to ship with them,and if my box is over size they charge more. I am amazed you got $1700 of insurance for $29 let alone ship a guitar also. I did just ship a Squier 51' for $20 with USPS with DC but I spent $15.00 for packing