Google-sheets – Extracting Price Information from IKEA website

The error in your importxml was in the xpath syntax. here is the correct one:

=CONCATENATE(IMPORTXML("http://www.walmart.com/ip/Morton-Sea-Salt-Fine-Salt-17.6-oz/10849552","//*[@itemprop='price'][1]"))

edited: added the [1] at the end of the xpath to prevent the duplicate price.

The command IMPORTXML ignores the nodes with no text content: for example, taking //div[3] from the document where the body consists of

<div>First</div> <div>Second</div> <div></div> <div>Fourth</div>

results in "Fourth". So, when you count the <div> elements, skip over those where there is no text. The elements you are looking for are returned with

=IMPORTXML( url , "//div[@id='companyProfile']/div[4]/span")

and

=IMPORTXML( url , "//div[@id='companyProfile']/div[5]/span")

For a more robust solution, I advise not relying on the numbering of elements at all. The following command returns both values you want with a single call, one under another:

=IMPORTXML( url , "//div[@id='companyProfile']/div[@class='sub-heading']/span")

You can apply TRANSPOSE to the result to put them side by side, if preferable. Or, if some custom positioning is needed, get one at a time with

=IMPORTXML( url , "//div[@id='companyProfile']/div[@class='sub-heading'][1]/span")

and

=IMPORTXML( url , "//div[@id='companyProfile']/div[@class='sub-heading'][2]/span")

Note that one should use single quotes in an XPath command, since it's a string surrounded by double quotes.

Using Inspect Element tool is not an inherently bad idea (it shows a nice tree view of the document), but there is an important caveat: this tool shows the document after any JavaScript runs on the page, while IMPORTXML gets the source as it is before any JavaScript processing. This matters when some elements get added by a script (example in my answer here). To see exactly what IMPORTXML works with, use right-click -> "View Page Source" in Chrome, or its equivalent in other browsers.