Thrifty purchasing...

[OhhWatALoser]

would do best being housed alone majority of time as she does not eat well if housed with another snake.

That's pretty typical of ball pythons in general. Who knows how long he kept her with another snake and she refused to eat. After a year and a half most ball pythons will weigh more than that, but some are picky eaters or have an uneducated owner. Also I would be skeptical of the het hypo part from an inexperienced owner.