Name Of Our Film- Ideas & Final Decision

To begin with, we brainstormed a variety of names that could be potentially used and that wee suitable for our film.Here are the original names we discussed:
-The Exchange. This name is fairly bland and uninteresting, and only suggests one aspect of the film. We decided this would be a bad name as it made the audience focus on a less important aspect of our film.
-The Afterparty. We were quite keen on this idea as all the thriller action occurs after the original party shot at the beginning, so was sensible and fairly clever. However, it did not fit perfectly with our plot line and did not get very good reviews with potential audience members, so we decided not to use it.
-Paid In Full. We were very keen on this name as it left ambiguity as to the content and made the film mysterious. The 'paid' aspect of the title is in reference to the exchange but then in how the boy paid for his actions with his life, a very 'full' payment indeed. Potentially, as the film continues, this name could still be relevant as we see the exchange mans idea of justice in his world.
-On A Knife Edge. We did not deem this idea as particularly suitable as it gave the idea of a prolonged chase of some sort within the film, and nobody within out film was in fact 'on a knife edge' excessively, although you can see aspects of this within the 'protagonist' as he nervously looks around,fearful of being followed.

We decided the name 'Paid In Full' would be most suitable for our film production as it is mysterious yet gives off the right impression in that it is quite a dark name that is sinister and begs a question in its name to lead the audience on to be more interested.