I don't know what the pricing issue is, since I'm seeing them all at $6.39 each here in Canada. Maybe they just charge newer book releases at full price, but then allow discounting to try and move the older backlist, and it's a glitch that they don't check when it comes to duplicate titles.
But I can tell you that these are likely NOT Topaz format, so you should have no worries on that point.
For future reference, you can tell a Topaz book by looking at the Product Details, and if it gives you a Print Length only, without an accompanying File Size, then it's Topaz. You can also download a sample to check the formatting.
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