Still Mars. Unknown companies, unknown quality, unknown warranties (as in mostly non-existent). And sending it back to China to exchange a defective unit? Suddenly that $30 isn't.
A wide range of these products are available at reasonable markups via a variety of Amazon Marketplace resellers.
That's how I got my first one. But since then I've started ordering direct from Alibaba/Aliexpress and for many products the savings are large enough to "self insure" and still be worth it with a good margin.
