[Mathias.]

I've setup a timer instead of frame request. I haven't had issue this time.

PHP Code:

#pragma semicolon 1
#include <sourcemod>
#include <clientprefs>
#include <sdkhooks>
#include <sdktools>
#include <cstrike>
#pragma newdecls required

public Plugin myinfo = 
{
    name = "m_bInBuyZone",
    author = "A guy in Canada",
    description = "",
    version = "13.3.7",
    url = "https://forums.alliedmods.net/showthread.php?t=314996"
};
int g_iaGrenadeOffsets[] = {15, 17, 16, 14, 18, 17};

public void OnPluginStart() {
    HookEvent("player_spawn", OnPlayerSpawn, EventHookMode_Post);
}

public void OnPlayerSpawn(Event event, const char[] name, bool dontBroadcast) {
    int userid = event.GetInt("userid");
    int client = GetClientOfUserId(userid);

    int team = GetClientTeam(client);

    if (!client) return;

    if(IsClientInGame(client))
    {
        CreateTimer(0.1, RFrame_CheckBuyZoneValue, GetClientSerial(client)); 
        
        if(GetRandomInt(1,10) == 1)
        {
            if(team == 3)
            {
                char usp[32];
                
                GetClientWeapon(client, usp, sizeof(usp));
                
                if(StrEqual(usp, "weapon_usp_silencer"))
                {
                    int uspslot = GetPlayerWeaponSlot(client, CS_SLOT_SECONDARY);
                    
                    if (uspslot != -1)
                    {
                        RemovePlayerItem(client, uspslot);
                    }
                    GivePlayerItem(client, "weapon_hkp2000");
                }
            }
        }
    }
}

public Action RFrame_CheckBuyZoneValue(Handle timer, int serial) {
    int client = GetClientFromSerial(serial);

    if (!client || !IsClientInGame(client) || !IsPlayerAlive(client)) return Plugin_Stop;

    int m_iAccount = GetEntProp(client, Prop_Send, "m_iAccount");
    int team = GetClientTeam(client);
    
    int m_bHasDefuser = GetEntProp(client, Prop_Send, "m_bHasDefuser");
    int m_bInBuyZone = GetEntProp(client, Prop_Send, "m_bInBuyZone");

    PrintToServer("%N has m_bInBuyZone value of %d", client, m_bInBuyZone);
    
    if(m_bInBuyZone == 0)
    {
        if((m_iAccount > 1500) && (m_iAccount < 3000))
        {
            int iWeapon = GetPlayerWeaponSlot(client, CS_SLOT_SECONDARY);
            
            if (iWeapon != -1)
            {
                RemovePlayerItem(client, iWeapon);
            }
            
            int rndpistol = GetRandomInt(1,3);
            
            switch(rndpistol)
            {
                case 1:
                {
                    GivePlayerItem(client, "weapon_p250");
                    SetEntProp(client, Prop_Send, "m_iAccount", m_iAccount - 300);
                }
                case 2:
                {
                    if(team == 3)
                    {
                        int ctcz = GetRandomInt(1,2);
                        
                        switch(ctcz)
                        {
                            case 1:
                            {
                                GivePlayerItem(client, "weapon_fiveseven");
                                SetEntProp(client, Prop_Send, "m_iAccount", m_iAccount - 500);
                            }
                            case 2:
                            {
                                GivePlayerItem(client, "weapon_cz75a");
                                SetEntProp(client, Prop_Send, "m_iAccount", m_iAccount - 500);
                            }
                        }
                    }
                    else if(team == 2)
                    {
                        int tcz = GetRandomInt(1,2);
                        
                        switch(tcz)
                        {
                            case 1:
                            {
                                GivePlayerItem(client, "weapon_tec9");
                                SetEntProp(client, Prop_Send, "m_iAccount", m_iAccount - 500);
                            }
                            case 2:
                            {
                                GivePlayerItem(client, "weapon_cz75a");
                                SetEntProp(client, Prop_Send, "m_iAccount", m_iAccount - 500);
                            }
                        }
                    }
                }
                case 3:
                {
                    GivePlayerItem(client, "weapon_deagle");
                    SetEntProp(client, Prop_Send, "m_iAccount", m_iAccount - 700);
                }
            }
        }
        else if(m_iAccount > 3000)
        {
            RemoveNades(client);
            
            int rndnades = GetRandomInt(1,4);
            
            switch(rndnades)
            {
                case 1:
                {
                    GivePlayerItem(client, "weapon_flashbang");
                }
                case 2:
                {
                    GivePlayerItem(client, "weapon_smokegrenade");
                }
                case 3:
                {
                    GivePlayerItem(client, "weapon_hegrenade");
                }
                case 4:
                {
                    if(team == 3)
                    {
                        GivePlayerItem(client, "weapon_incgrenade");
                    }
                    if(team == 2)
                    {
                        GivePlayerItem(client, "weapon_molotov");
                    }
                }
            }
            if(team == 3)
            {
                if(m_bHasDefuser != 0)
                {
                    GivePlayerItem(client, "item_defuser");
                }
            }
        }
    }

    return Plugin_Stop;
}

stock void RemoveNades(int client)
{
    while(RemoveWeaponBySlot(client, 3)){}
    for(int i = 0; i < 6; i++)
        SetEntProp(client, Prop_Send, "m_iAmmo", 0, _, g_iaGrenadeOffsets[i]);
}

stock bool RemoveWeaponBySlot(int client, int iSlot)
{
    int iEntity = GetPlayerWeaponSlot(client, iSlot);
    if(IsValidEdict(iEntity)) {
        RemovePlayerItem(client, iEntity);
        AcceptEntityInput(iEntity, "Kill");
        return true;
    }
    return false;
}