... especially considering you've been more then 
patient while waiting for this payment. Like you 
stated, the sale was more then 3 months ago. I 
don't think many people (if any) would be willing 
to wait for payment for this long.  Sure, mail 
gets lost or misdelivered occasionally -- it's 
happened to me as I stated previously.. but you 
are running a business. If the payments not 
received *again* you can't sit on the cels 
forever.   Hopefully for you both the payment 
will show up soon :/