You should ALWAYS take a look at other auctions for the same item. You'll need to pay if the seller won't cancel, as it says when you click that button: You enter into a binding contract. Pay, and learn from your mistakes, and anyway, it's one measly dollar, not worth causing a big fuss over.
And the second one is more reliable, just going by a quick glance at the feedback stats, but you'd be perfectly safe with both.
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