Source Apple Certified Pre-Owned iPhone 5, iPhone 5s in Europe

I just photographed these on the European continent in a mom and pap mobile shop. Shrink-wrapped. The shop assistant could tell it for sure sure, but maybe they are from the UK. There were also 5s models, just not so photogenic than the 5.

The question is, if I want a reliable source for these, not the mom and pap mobile reseller, which is a good place to buy these anywhere (in Europe, or possibly elsewhere, too).