Fully Operational , one of the most offensive books to my sensibilities in some places (mainly the starship crafting rules that really, really suck), gives us the Ion Torpedo. It's a powerful but not unbalanced weapon system, and like all launchers, it has Limited Ammo to keep it from being spammed all over, or so it seems...
The cost to fully reload an Ion Torpedo Launcher with Limited Ammo 4 is just 400 credits! That's only 100 credits per torpedo, making it cheaper than most personal scale missiles and close to the price of many grenades. Comparatively, Concussion Missiles are 500 credits per missile and Proton Torpedoes are 750 credits per torpedo. While even these costs seem low, they really highlight how absurdly inexpensive Ion Torpedoes are. Additionally, Ion Torpedoes are not Restricted like Proton Torpedoes and Concussion Missiles (the missiles are Restricted even though the launcher is not), so these things are a legal to own heavy hitter that's cheap to replenish. I'm not so sure that's a good thing as it makes (literal) rocket tag even more attractive of an option.
Edited by HappyDaze