I don't think they ever put out an album before moving to Macon so yes, they became successful in Macon but most of the band members were either from Florida or grew up in Florida and the band was formed in Florida. Greg and Duanne were born in Nashville but grew up in Daytona. Dickey was born...
They were a Florida band. They moved to Macon because their manager Phil Walden was trying to start his own record company in Macon ( Capricorn) and he gave them free place to stay and rehearsal hall.
Lynyrd Skynyrd, The Outlaws, Allman Brothers, Tom Petty and the Heartbreakers, Blackfoot, Molly Hatchet just to name a few, a lot of great bands from Florida.
It would be nearly impossible to prove that he bought a gun with the intent of selling it 50 years later and making a profit. That has nothing to do with what this new rule is about anyway. It plainly states that it does not effect this sort of transaction. From the OP's link:
“The final rule...