The ShengShou Gigaminx is far cheaper than any other gigaminx on the market as it is only £14 at speedcubing.org. Despite its low price, it still performs quite well once the tensions have been loosened (they are far too tight out of the box). The corner cutting is not quite as good as the YuXin and DianSheng but I am still able to get similar times with it.

You can buy it here