In the galaxy the following melee weapons are relatively easy to obtain.  Melee weapons are often allowed in places where other weapons are not allowed.  None of these weapons can pierce the skin of a space ship.  Melee weapons are often used to repel boarders.

Available in every culture (with the appropriate TL)

Item Name

Effects

Costs

Notes

Brass Knuckles
+1d6 Hand-to-Hand, Armor Piercing and Penetrating, Not vs. physical armor
50
General
Dagger
1d6 KA, 6 STR Min
100
General
Knife
1/2d6 KA, 4 STR Min
75
Easy
Shock Baton
+2d6 Hand-to-Hand, 8 STR Min
3d6 EB AVAD (Power Defense), 16 Boostable Recoverable Charge, 1m stretching
300
Army Surplus

Racial Melee Weapons

Item Name

Effects

Costs

Notes

Minbari Fighting Pike
+4d6 Hand-to-Hand, 10 STR Min, +1 OCV, 1m reach, Shrinks to 5 inches
1500
Only for Minbari or Rangers
Narn Katak (Broadsword)
1.5d6 HKA, 12 STR Min, 1m reach
750
Narn markets
Centauri Coutari (Short Sword)
1d6+1 HKA, 10 STR Min, 1m reach
750
Centauri markets

Anyone who is not a member of the Ranger or a Minbari will find themselves being confronted by other Rangers and Minbari, which usually doesn't go well for anyone not well trained.