Deeply into this stuff. In fact, I am working on an annotated complete prewar discography of Cajun and Creole music, and have gotten through 1928 and 1929. It's more than a standard discography, I'm also trying to connect the dots between the different melodic strains -- the Cajuns often renamed their tunes so it can be hard to find early versions of later songs. And, I'm listening to everything as I work on this -- so much fun!! And, even though I've been into this music for over 40 years, I'm still discovering new things about it.
I don't collect the actual 78s, but I am supremely thankful for those collectors who do and especially those who have shared the music. Still one that's never been found - Montet and Dupuis, L'Eau Haute (High Water Waltz) and Nina One-Step.