Yea I have always been curious why all of these mostly legal alternatives aren't more popular. I figure either people don't want to do the small amount of work it takes, or they may have a bit of fear holding them back. Maybe its because some of these substances can cause nausea, idk but that's never held me back.
You want to get seeds that haven't been treated with pesticides or anything. Again, eBay will have untreated seeds at a great price. I would get Hawaiian Baby Woodrose because it only takes a few seeds for a good dose, and they have a higher content of LSA. With Morning Glory you need a few hundred seeds for a dose, so its more work.