[digitalsanctum]

This is something I've been thinking a lot about recently in the context of an area I might try to build a SaaS for.

One domain I've encountered that falls into this category is mom and pop food stores which don't typically have a decent website. You typically have to visit the store or call to find out things like what they stock and current prices (to do comparison shopping).

[dv_dt]

I would cautiously advise to spend time with a lot of the stores learning about their problems before building that. For it not to be duplicate, or added work for a small shop, you might need to take over all the inputs and outputs of their inventory/pricing, not just for the online portion.