Re: Why not a cargo version
Because nothing - absolutely nothing - can beat ocean shipping for costs.
Even a back of the envelope calculation suggests that carrying 10,000 widgets in 1 TEU container from the UK to LA (so the long way) is c. $2,500/10,000 = 25 cents per item. And I'd guess you could get 10,000 HDDs (for example) in a TEU, easily.
Seriously, if you have something from China, the most expensive part of the journey will be from the depot to your house.