K.R.
I used to sell Usborne Children's books and did many mom to mom sales. I always did well. The first hour or so is JUST people looking for the deals. But after that they would take their time and look.
Definitely do them with the mindset of getting leads vs. selling. Thinking long term about building. I would get leads for shows, consultants and book fairs at schools and would also usually sell around $250 worth of books.