I would want people to sell me things, even if they consider my beliefs so utterly silly as to be a delusion.
I would also want them to try and persuade me to give up any delusions they thought I held, but in the event that fails I would rather they not decide that I am not sane enough to deserve to buy from them.
http://eternal-earthbound-pets.com/Home_Page.html
Providing assurance that pets will be provided for in the event of Rapture.
Having thought it over, I'm OK with the ethics of this service.