how do i set up vender that only sells to group

how do I add a only for sale if in the same group as this is set to?
if (llSameGroup(llDetectedKey(0)))
{

integer price;

resetscript()
{
    llResetScript();
}



default
{
    state_entry()
    {
         llRequestPermissions(llGetOwner(), PERMISSION_DEBIT);
    }
         run_time_permissions(integer perm)
    {
        if(perm & PERMISSION_DEBIT)
        {
           
            state setprice;
        }
                 
    }
    on_rez(integer pop)
    {
        resetscript();
    }
}

state setprice
{
    state_entry()
    {
         llInstantMessage(llGetOwner(),"set the description of this prim to the price then touch it");
    }
    touch(integer pop)
    {
    
         if (llSameGroup(llDetectedKey(0)))
         {
          price = (integer)llGetObjectDesc();
          llInstantMessage(llGetOwner(),"price set to "+(string)llGetObjectDesc());
          state now_excepting_cash;
        {

}}}}

state now_excepting_cash
{
    state_entry()
    {
       llSay(0,"open");
     
         price = (integer)llGetObjectDesc();
    }
    
     money(key id, integer amount)
    {
        // how do I add a only for sale if in the same group as this is set to?
        // if (llSameGroup(llDetectedKey(0)))
        // {
             llSay(0,"same group");
               price = (integer)llGetObjectDesc();
               if(amount >= price)
            {
                if(amount - price > 0)
                {
                llGiveMoney(id, (amount - price));
                llInstantMessage(id, "heres your change"+(string)(amount - price));
                }
         
                 llGiveInventory(id,"thing thats inside it");
              
           }
        else
        {
            llGiveMoney(id, amount);
            llInstantMessage(id, "Price is L$" + (string)price);
        }        
      }
}

I'm not sure if Money uses DetectedKey.
Try llSameGroup(id) instead on the Money event.

http://secondlife.com/badgeo/wakka.php?wakka=money

That requires the object to belong to the same group as the group from which you want people to buy:

http://secondlife.com/badgeo/wakka.php?wakka=llDetectedGroup
( http://secondlife.com/badgeo/wakka.php?wakka=llSameGroup is similar, but does need the AV to have tht group ACTIVE.)

Maybe there's another way, but that's all I can think of atm.

*mew*
Sheila.

You have the key of the payer from the Money event..

So do llSameGroup (id)...and DetectedKey(0) does not work from a money event, but you got the key passed to you anyways, so don't need it.