I originally saw how to do it on Reddit but now I can't find that post ... You can actually use Google to do it.
Search for "Barnes and Noble" and it should come up with address listings for your closest stores ... If you click on any of those addresses it will take you a page like this ...
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In the "Search this store" box, just type in vinyl records...
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It will essentially show you every album they currently have in stock and as you scroll through you're looking for ones like this that say "Good Price" ...
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Others might also be in stock but not marked with that tag. It should be obvious which ones are the best prices.
This works in theory but my wife and I went to one today and didn't find one of the titles that was listed on the site, yet we did find others that weren't mentioned (although they weren't on sale anyway).