Rather than quoting a lot of posts, I im just going to respond to a couple of points.
1) USPS
I ship a lot of guitars through them. I pack the shit out of them and insure for full value. They require 2 inches of packing around a fragile object. Coast to coast it averages 120 bucks to ship, half of that cost is insurance.
Usps, doesn't fight you on claims. Ive never had a problem with high dollar guitars, but have had a few smaller items get damage in shipping.
UPS on the other hand are dicks. Unless they packed it, no matter how well you've packed, wont pay out.
They give you the insufficiently packed excuse.
They dont pack well.
2) shipping costs on the bay.
I dont think many have any idea on bigger items , the cost of properly packing, shipping, and insuring an item.
I think also they feel that real world shipping prices would scare off bidders.
When i see a Reel to Reel deck with a shipping cost of 25 to 50 bucks, thats a red flag. Youll get bad packing.
3) msr16
Thats a heavy machine, about 75 lbs.
The factory box is real good, but even so, I'd out it inside another box with 2 inches of foam.
I'd estimate that would run about 150 to ship cross country with proper insurance. Maybe a bit more.
Moral of the story is: Save original boxes, pack well, insure the hell out of it.
Double box when needed.
If you are a seller, charge realistic shipping fees. This may drive some people away, but a good explanation of your shipping policies and procedures will go a long way for inspiring confidence.
I know Ill pay more for shipping, knowing it will arrive safe.