fnc_p2CountStaticVehicles = {
    private["_vehCount","_list","_charId"];
    _vehCount = 0; //start with 0

    _list = ([0,0,0]) nearEntities [[_this], 25000]; //for each vehicle that already exists (within 25000m) with input classname (_this)
    {
        _vehCount = _vehCount + 1;  //add 1 to vehicle count

        _charId = (_x getVariable ["CharacterID", 0]); //check if this vehicle was purchased using char id
        if (typeName _charId == typeName "") then {
            _charId = parseNumber _charId;  //if charId is a string, convert it to a number
        };
        if (_charId > 0) then {
            _vehCount = _vehCount - 1;  //if charId greater than 0, vehicle was purchased, take the 1 away from the vehicle count
        };

    } forEach _list; //end of for each vehicle that already exits

    //return the amount of vehicles it counted
    _vehCount
};

//call the function using Ka52 as input, store result as _result
_result = "Ka52Black" call fnc_p2CountStaticVehicles;
//output result to logs
diag_log str _result;

//In log we see: "1", as there is 1 Ka52Black on the map that is not trader purchased