My thoughts are to have the cost as whatever the Wealth rating is. It'd be up to the player to adjust everything for purchases. Also, that way the Cost is at least visible...
Checking the weapons file: great!
I'm adding the appropriate User Tags to the weapons and I'll re-upload the whole thing together since I have the change with the Proficiencies that makes them show as proficient on the selector when purchasing.
(Just for reference they are:
<tag group="User" tag="ProfEMel" name="Proficiency - Exotic Melee Weapons"/>
<tag group="User" tag="ProfSimp" name="Proficiency - Simple Weapons"/>
<tag group="User" tag="ProfArch" name="Proficiency - Archaic Weapons"/>
<tag group="User" tag="ProfEFCa" name="Proficiency - Exotic Firearm (Cannon)"/>
<tag group="User" tag="ProfEFHM" name="Proficiency - Exotic Firearm (Hvy MG)"/>
<tag group="User" tag="ProfEFGL" name="Proficiency - Exotic Firearm (Grenade Launcher)"/>
<tag group="User" tag="ProfEFRL" name="Proficiency - Exotic Firearm (Rocket Launcher)"/>
<tag group="User" tag="ProfFire" name="Proficiency - Personal Firearms"/>
)
Also, Proficiency Groups:
<tag group="wGroup" tag="WPEMel" name="Weapon Proficiency - Exotic Melee Weapons" abbrev="WP - Exotic Melee Weapons"/>
<tag group="wGroup" tag="WPSimp" name="Weapon Proficiency - Simple Weapons" abbrev="WP - Simple Weapons"/>
<tag group="wGroup" tag="WPPFire" name="Weapon Proficiency - Personal Firearms" abbrev="WP - Personal Firearms"/>
<tag group="wGroup" tag="WPArch" name="Weapon Proficiency - Archaic Weapons" abbrev="WP - Archaic Weapons"/>
<tag group="wGroup" tag="WPEFCa" name="Weapon Proficiency - Exotic Firearms - Cannon" abbrev="WP - Exotic Firearm - Cannon"/>
<tag group="wGroup" tag="WPEFHM" name="Weapon Proficiency - Exotic Firearms - HMG" abbrev="WP - Exotic Firearm - Hvy MG"/>
<tag group="wGroup" tag="WPEFGL" name="Weapon Proficiency - Exotic Firearms - Grenade Launcher" abbrev="WP - Exotic Firearm - G. Launcher"/>
<tag group="wGroup" tag="WPEFRL" name="Weapon Proficiency - Exotic Firearms - Rocket Launcher" abbrev="WP - Exotic Firearm - R. Launcher"/>
)