I am glad that you decided not to go with the Craig's list dog.
When I clicked on the Craig's List link you inserted the page came up "This posting has been flagged for removal." That is not a good sign. I was told to avoid any breeder that would list their puppies online.
Drive the distance to get the Corgi puppy from the breeder on the Lakeshore list. It will be worth it. That is how I found my breeder in Iowa. We drove 5 1/2 hours to get our Corgis. The Corgi will be in your life 12 - 15 years. You want to do it right.
Good luck getting your Corgi. I can't wait to see your first pictures.