Small SPOILERS! for this side-mission (Turn away now if you don't wanna get spoiled)
So i collected all 30 submarine pieces for Abigail and all i got was a signed photo and $10 bucks.
After brutally murdering her for as the way she acted she actually rigged the submarine to sink.
Is that all i get? Or am i missing something? I mean diving is fun and beautiful but it was rather figity and time consuming and sort of boring not to mention i had to swim with the f*cking sharks... or tho i actually ranover like 5 of them.
UPDATE- The user Decon said that the car she uses is a VERY rare car and can only be obtained by doing that mission. Here is a picture of the ride that i took and customized it.