Chris bought that watch for $200, however he is not using it, he is such a fickle person.
ODO:
ADJECTIVE
Changing frequently, especially as regards one's loyalties, interests, or affection.
‘Unlike Fred who is a creature of habit, I am far more fickle, always in need of new experiences, change and variety.’
Collins:
adjective
If you describe someone as fickle, you disapprove of them because they keep changing their mind about what they like or want.