I’m probably going to sound really harsh here, but when it comes to illustrators… those kind of illustrator are probably not worth much anyway. A lot of those types of sellers are scammers in the first place. They steal work from other artists and modify it in photoshop to somewhat fit what you asked.
I’ve seen soooo many of them, reported so many of them too, but Fiverr doesn’t seem to do much about them. Buyers don’t always notice it, so they end up with good reviews, but as an illustrator myself I can spot them miles away.
I’m not saying all of them are scammers, but let’s face it, in some countries I won’t name, there is way to many “expert” and “professional” in the illustration category to be real.