I'm an advanced amateur when it comes to photography and post-processing and was looking for additional tutorials and resources to improve my craft. Specifically, I'm looking for any sites that have examples of professional photography with the original RAW file. The reason for this is that I want to try the post-processing myself and also to see the difference in the original vs the post-processed file (done by the professional).
Does anyone know of such sites? The other questions I've seen have answers pointing to sites that have RAW examples, but none that have good before & after shots with the source files.