Understand where you're coming from.
As a group, they have a reputation for poor service, even though there are some good individuals.
It's not so much because Roms are worth any less than any other nationality, it's because collectively their reputation precedes them and you're taking a more than usual gamble, so a discounted rate to the norm is justifiable.
Not so much deluded, more higher-than-normal risk of providing a crap experience.
I guess if you've found one who has earned a decent reputation and has decent communication skills, the rate's justifiable.
That's my interpretation.