[asteadman]

My guess is that it's using substituting one or more of the letters for some look-alike character out of the extended unicode character set. see: https://en.wikipedia.org/wiki/IDN_homograph_attack

[devoply]

ｂestbuy.com < homograph domain resolves apparently to the right domain.

Here is a generator you can fiddle with http://www.irongeek.com/homoglyph-attack-generator.php

Maybe you can find one.

[itcrowd]

There could also be an open redirect in bestbuy.com somewhere which is exploited