For an FYI, an idea on what 20 diamonds can get our characters.
One pristine weapon and a like a full magazine = 20 diamonds
a shit state weapon, 6mags, food, drink and maybe extra mags for your side arm = 20 diamonds
On the other hand
a plate carrier harness, with pockets for explosives, 2ceramic plates one front one back, 20 diamonds and a barter for the weapon you picked up during the fight
There are tons more combinations. Just need to ask (perferably IC) the many merchants. And see what you came come up with.
But nix on any RPGs at the moment, none of us even pooling our resources are going to be able to net a launcher of any kind.
Feel free to try and bargain who knows what interesting things may come up
@FourtyTwo@Starlance