I bought for 500 pcs computer systems from ACE Traders. I transfered the money for $35, 793. On March 18, 2009, Ace traders shipped only 373 pcs computer systems and the amount on the invoice was $25, 456.45. So I asked ACE TRADERS TO GIVE ME BACK my refund. So far they haven't refunded my money. When my customer got the systems, he found several missing parts in the systems. Until now, I am trying to get my money back and the missing parts. I tried to email and called them so far they haven't responded . I wrote to BBB.org. ACE TRADERS didn't reply the letter.