Shellie, is she giving you a written contract with a guarantee on health issues? I would definitely add a clause about the hernia...that she is responsible for repair if it should be needed.
Kind of hard to comment further...I would simply take him to my vet immediately (as in day of sale) to have him checked out. I would not trust her vet's opinion alone.
I am sure you will get some other feedback on this...
Good luck!
