This trader system is offered free without any guarantee or promise and users should back up their files before proceeding.
It is compiled by [CiC]red_ned of http://cic-gaming.co.uk from different sources including documentation on Exilemod and in game from various places.
I have only compiled what I found, attempted to simplify class names and created files for what I couldn't find and is given back to the community as thanks.
If you use then you should consider sharing any further development, bug fixes or expansions (as I have probably missed objects out or spelled things incorrectly).
This file does not include how to install mods or add to loot tables as that is already well documented.
ned

*** Update v7.2 ***
Added : TankDLC
Thanks to @ItsDutch plus his contributors

*** Update v7.1 ***
Added : HAFM
Added : MASWW2
Added : NLD
Added : POOK
Thanks to @ItsDutch plus his contributors

*** Update v7.0 ***
Updated for Exile 1.0.4 "Pineapple"

*** Update v6.8 ***
Added FHQ mod - thanks to Poptart4050 for files

*** Update v6.6 ***
Added KA Mod - thanks to CHAINSAW SQUIRREL
Text sorted some more files and checked optimisation of tabs not spaces

*** Update v6.5 ***
Added 100+ vehicles into RHSV
Added some missing Arma3 vehicles

NOTE RHS IS BOTH RUS AND USA.

****** Thanks to all the following for help ******
****** XxFri3ndlyxX, [RG] Salutesh, SE7EN	******
****** Tobias Solem, pomp4h, Bob_the_K		******
****** Razor77, jmayr2000, C][G GhostTown™, Poptart4050	******
****** ElShotte, Killerpoodezz,CHAINSAW SQUIRREL	******

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1.	INSERT THE TRADERS FOLDER INTO YOUR MISSION PBO, DELETING ANY MOD FOLDERS YOU DONT USE.

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2.	IN CONFIG.CPP IN MISSION PBO: REPLACE FROM "class CfgExileArsenal" DOWN TO LINE ABOVE "class CfgExileCustomCode" with (CHOSING WHICH MODS YOU ARE USING AND DELETE OTHER LINES)

class CfgExileArsenal
{
	#include "TRADERS\APEX\ItemListAPEX.hpp"
	#include "TRADERS\ARMA3V\ItemListARMA3V.hpp"
	#include "TRADERS\ARMA3W\ItemListARMA3W.hpp"
	#include "TRADERS\BPOINT\ItemListBPOINT.hpp"
	#include "TRADERS\CUNITS\ItemListCUNITS.hpp"
	#include "TRADERS\CUPV\ItemListCUPV.hpp"
	#include "TRADERS\CUPW\ItemListCUPW.hpp"
	#include "TRADERS\CUSTOM\ItemListCUSTOM.hpp"
	#include "TRADERS\EBM\ItemListEBM.hpp"
	#include "TRADERS\Exile\ItemListExile.hpp"
	#include "TRADERS\FFAA\ItemListFFAA.hpp"
	#include "TRADERS\FHQ\ItemListFHQ.hpp"
	#include "TRADERS\FMP\ItemListFMP.hpp"
	#include "TRADERS\FOX\ItemListFOX.hpp"
	#include "TRADERS\HAP\ItemListHAP.hpp"
	#include "TRADERS\HAFM\ItemListHAFM.hpp"
	#include "TRADERS\HVP\ItemListHVP.hpp"
	#include "TRADERS\HWP\ItemListHWP.hpp"
	#include "TRADERS\Jonzie\ItemListJonzie.hpp"
	#include "TRADERS\JETS\ItemListJETS.hpp"
	#include "TRADERS\KA\ItemListKA.hpp"
	#include "TRADERS\MASV\ItemListMASV.hpp"
	#include "TRADERS\MASW\ItemListMASW.hpp"
	#include "TRADERS\MASWW2\ItemListWW2.hpp"
	#include "TRADERS\NIA\ItemListNIA.hpp"
	#include "TRADERS\NLD\ItemListNLD.hpp"
	#include "TRADERS\PODS\ItemListPODS.hpp"
	#include "TRADERS\POOK\ItemListPOOK.hpp"
	#include "TRADERS\R3FW\ItemListR3FW.hpp"
	#include "TRADERS\RHSGREF\ItemListGREF.hpp"
	#include "TRADERS\RHSSAF\ItemListRHSSAF.hpp"
	#include "TRADERS\RHSV\ItemListRHSV.hpp"
	#include "TRADERS\RHSW\ItemListRHSW.hpp"
	#include "TRADERS\TANKDLC\ItemListTANKDLC.hpp"
	#include "TRADERS\TRYK\ItemListTRYK.hpp"
	//#include "TRADERS\HLC\ItemListHLC.hpp"		//should use NIArms
};

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3.	IN CONFIG.CPP IN MISSION PBO: REPLACE FROM "class CfgTraderCategories" DOWN TO LINE ABOVE "class CfgTraders" with (CHOSING WHICH MODS YOU ARE USING AND DELETE OTHER LINES)

class CfgTraderCategories
{
	#include "TRADERS\APEX\TraderCategoriesAPEX.hpp"
	#include "TRADERS\ARMA3V\TraderCategoriesARMA3V.hpp"
	#include "TRADERS\ARMA3W\TraderCategoriesARMA3W.hpp"
	#include "TRADERS\BPOINT\TraderCategoriesBPOINT.hpp"
	#include "TRADERS\CUNITS\TraderCategoriesCUNITS.hpp"
	#include "TRADERS\CUPV\TraderCategoriesCUPV.hpp"
	#include "TRADERS\CUPW\TraderCategoriesCUPW.hpp"
	#include "TRADERS\CUSTOM\TraderCategoriesCUSTOM.hpp"
	#include "TRADERS\EBM\TraderCategoriesEBM.hpp"
	#include "TRADERS\Exile\TraderCategoriesExile.hpp"
	#include "TRADERS\FFAA\TraderCategoriesFFAA.hpp"
	#include "TRADERS\FHQ\TraderCategoriesFHQ.hpp"
	#include "TRADERS\FMP\TraderCategoriesFMP.hpp"
	#include "TRADERS\FOX\TraderCategoriesFOX.hpp"
	#include "TRADERS\HAP\TraderCategoriesHAP.hpp"
	#include "TRADERS\HAFM\TraderCategoriesHAFM.hpp"
	#include "TRADERS\HVP\TraderCategoriesHVP.hpp"
	#include "TRADERS\HWP\TraderCategoriesHWP.hpp"
	#include "TRADERS\Jonzie\TraderCategoriesJonzie.hpp"
	#include "TRADERS\JETS\TraderCategoriesJETS.hpp"
	#include "TRADERS\KA\TraderCategoriesKA.hpp"
	#include "TRADERS\MASV\TraderCategoriesMASV.hpp"
	#include "TRADERS\MASW\TraderCategoriesMASW.hpp"
	#include "TRADERS\MASWW2\TraderCategoriesWW2.hpp"
	#include "TRADERS\NIA\TraderCategoriesNIA.hpp"
	#include "TRADERS\NLD\TraderCategoriesNLD.hpp"
	#include "TRADERS\PODS\TraderCategoriesPODS.hpp"
	#include "TRADERS\POOK\TraderCategoriesPOOK.hpp"
	#include "TRADERS\R3FW\TraderCategoriesR3FW.hpp"
	#include "TRADERS\RHSGREF\TraderCategoriesGREF.hpp"
	#include "TRADERS\RHSSAF\TraderCategoriesRHSSAF.hpp"
	#include "TRADERS\RHSV\TraderCategoriesRHSV.hpp"
	#include "TRADERS\RHSW\TraderCategoriesRHSW.hpp"
	#include "TRADERS\TANKDLC\TraderCategoriesTANKDLC.hpp"
	#include "TRADERS\TRYK\TraderCategoriesTRYK.hpp"
	//#include "TRADERS\HLC\TraderCategoriesHLC.hpp"		//should use NIArms as that is newer and working version of HLC
};

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4.	IN CONFIG.CPP IN MISSION PBO: REPLACE FROM "class CfgTraders" DOWN TO LINE "class CfgTrading" with

class CfgTraders
{
	#include "TRADERS\CfgTraders.hpp"
};
You can alternatively copy the cfgtraders file content over the traders in the main config, not recommended.