I left a voice mail and emailed the seller but never heard back. I guess it was not meant to be. I definitely appreciate all the advice, these are all great tips to keep in mind should I buy something on craigslist in the future.
I for sure would not have gone any other route other than meeting at a jeweler of my choice. But regardless buying something like this through craigslist is scary.
The rings in our budget when we have gone to retail jewelers are around the 3/4 ct size. I guess I just got a little excited at the idea of finding a 2ct in our price range!!