F--k only knows. But I do know it is $£&%-ing me off.
Half of my questions to sellers now start with, 'I am interested in said item, but until you find an alternate and vastly cheaper method of shipping, I won't be bidding my extraordinarily high bids.'
More often than not, sellers say it is automatically chosen for them when making the listing. And I wonder if they are doing all their selling on bloody phones whereby you can't see, or don't have, all the options. Either way, they then change it - sometimes.
It is not obviously even available in the UK.