Blanks showing in table visual

swb128  Hi, happy to hear you found the issue! "Power Query analyzes the example file (by default, the first file in the list) and determines the correct file connector to use to open that file." 

https://learn.microsoft.com/en-us/power-query/combine-files-overview

So It builds transformation steps (like types) based solely on that file. And those steps are then applied to all other files, even if they are different or leading to missing or null values like in your ListPrice column.

I would go back and inspect csv data in excel or notepad before I load them in power query, identify one of the incorrupt ones and use it as the first file. 
Not sure if there's a better or automated way. Maybe other people can advise?