Sell (someone, something, or oneself) as (something) informal verb phrase
To represent someone, something, or oneself as a specific type of person or object, particularly so as to obtain the favor or acceptance of others.
If you want the director to accept your proposal, you have to sell her as the best actress for this role.
Is the result worth the effort we have to put into it?
To take something into consideration in a thorough way
To think or consider something seriously
To think carefully and seriously or ponder about someone or something
The verb "sell" should be conjugated according to its tense.
Try to avoid to change something because doing something else could make things worse
I could have changed my answer, but I decided to leave well enough alone.