I’ve recently sold a couple of items on the bay, one went through their global shipping without a hitch, but the second item was too heavy to be covered by their system - they only go up to 10kg.
Shopping around I got quotes from comparison sites Parcel2go and ParcelMonkey. Monkey coming out £16 cheaper for a similar insured service (£22 to £38).
The only problem is that you cannot complete the order without knowing the buyer’s telephone number, something the bay doesn’t provide. Fortunately an exchange of emails through the bay sorted that but it did delay the process.
I was quite surprised that the first item sold abroad (Italy) as I had only quoted UK postage. I had not ticked any boxes to use their GS.
Rod