I know, that's why I said in my original comment that there needs to be some consideration by the buyer (also on the part of them understanding a pre-made item won't be tailor made).
"It'd sort of be their responsibility to see a way to try it first, like a friends."
To be fair, I think suit heads can be made in different ways depending on the artist, so testing a friend's possibly tailor made and more pricey (like maybe one with a fan etc) might give them a possibly wrong idea that all suit heads are made in way X and so on...
Overall that still won't really excuse a buyer's remorse if this person is having it.