I would say yes people would. I don't sell soap (have been making less than six months, not long enough and have no plans to it's a hobby).
I think for a few reasons.
Curiousity, it is a boutique product. People are intrigued by it the look, the smell. The fact that it is different to the tore bought stuff. I think they see/smell something they like and they want to try it.
A solution to soaps they can get a the store. When I tell people I have made soap they automatically ask if I sell it as they prefer it to store bought as the store bought is harsh on their skin and although they might not have used hand made soap they beleive it will straight away be a better prouct for them (I also love that as soon as you tell someone you make something, they assume you want to sell it, I have this with every craft I do)
The ingredients, beer soap- I think it draws people in.
I also think the fact that people are now increasingly returning to more natural alternatives is also a reason, as to thefact artisan/ handmade items are in fashion.
I also think once they try the handmade item, people are more inclinded to continue using it. It smells so much nicer, no need for room smelly things with hand made soap it scents the whole room, it feels nicer.
At least that is what I think anyway.