You will most likely get the 25 GC. What are you looking for in pheromone use? You mentioned ammo so I assume attraction from girls. Ammo is always a great start on your journey into mones. The are plenty of other choices too. What type of personality do you have? Just remember mones will not do all the work for you. The user must put effort of their own. Instant shine along with ammo is a great combo to begin with also. Here is a thread on how to find your sweet spot