Key fob is probably priced differently, I have one OEM and a generic backup that I got on eBay. Bell ships USPS, Chatham ships FedEx. Everything I have ever ordered from from Chatham has shipped within 24 hours and I have ordered some obscure parts.
So this is how it works to the best of my knowledge. I used to live in Scottsdale and ordered a ton of parts from Bell and Right Toyota for vehicles that I would restore from Copart. Bell and Right, if they don't have the part, they order it from their west coast parts warehouse in Ontario, California. Once they receive the part, they ship it to you.
I have never been to the Chatham dealership in Savannah, GA, but that's a small town, so probably a small dealership. I doubt they have a lot of parts on hand. Their parts are shipping directly from the east coast Toyota parts warehouse, which is in West Caldwell, NJ. That is why the parts ship so quickly. They are not receiving the parts to their dealership and then forwarding them on to you.