Anyone bought anything from them, they have iphone’s at decent prices or is it all stolen gear that’s likely to be blocked?

They take steps to make sure stuff isn’t stolen, given that they are a retailer rather than a private vendor (such as an ebayer) then you’ve got the same sale of goods / trading standards protection as you would with any other high street store and if anything is problematic you can return it.

After an iphone.. step into my office.

If it was stolen you would be able to return it
That said I would imagine a % of their business is stolen goods despite them taking reasonable precautions to check/minimise/ stop this
Why would they want stolen goods – hardly helps them out