When I left them, they were.

A shop should be about your abilities, not your amenities. You have to decide if you want to have a shop based on your work or a shop based on retail. Either can work but like that nose trimmer that's also a flash light, ratchet wrench, toaster oven and garden rake, you can't be everything to everyone and excel at it.

Personally, retail is much easier but the overhead is much more. Sit on your ass in the A/C and peddle parts seems like a great idea to me.