Your robins will be sooo happy when you get one, Sally.
I have had a bird bath that looks like this one for a long time...seems like 10 years.
https://www.amazon.com/dp/B0006HRQNQ/
I'm not positive it's the one I have, but it sure looks like it. I highly recommend it. It's $87 on Amazon ($129 at Duncraft!).
I would steer clear of this one:
https://www.amazon.com/dp/B0006HRQNQ/ My DD gave me this for Christmas, so of course I use it, but the water evaporates from it way too quickly. I can fill it at night and the water will be mostly gone by morning. It looks nice, but it's a pain to have to fill it once or even twice a day.