This could be an idea to consider - putting together a vintage stereo gear audio podcast. There are none showing up in the iTunes store. There have to be enough vintage gear heads out there that it could easily catch a few thousand subscriber quickly.
The vintage audio podcasts that are out there seem to relate to old music recordings, not gear.
A twist on this idea could be to make it a Carver Vintage Gear podcast, and invite Bob (assuming you can pull that off) to the call every so many episodes.
Just a thought - I drive many hours a week and spend a lot of a time listening to podcasts of all sorts that way and at the gym. I would not mind listening to folks discuss old ger. And it would advertise the store.
OBG