Would it be possible to combine a retail store with the (City Living) street sales tables? I would like a specific lot where my sims can go to sell their small scale stuff, say they go there only one day every week. I tried on a few community lots, but visiting NPCs never payed interest to their selling table, as the lot category seems to override it. Didn't try on a retail lot, though.
Back on topic: in the past my sim had a store selling time capsules only. It was like selling surprise gifts, in a way.