Looks like its real. There have been some ebooks with crazy prices before on prerelease items but they were just placeholders until whoever is publishing set a real price. The same publisher has other ebooks as well which are very expensive but they all look like laboratory reference material so it'd be purchased by somebody for work usage.
I had a look at the publishers website and they sell the data in sets with each one costing between 50-300. The 5000+ price matches up with what it would cost to buy every single element set together in one book.
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