AMT 1/25 Chevy Beretta GTZ model kit (or MPC Beretta GT and GTU)

 I am looking for the AMT 1/25 Chevrolet Beretta GTZ (1989, # 6068, black car) mainly, but will consider the other AMT Chevy Beretta GTZ (# 6146, red car),  as well as the AMT Chevy Beretta GTU (1989, # 6273) and the MPC '87 Beretta GT (# 6261). I want to build one of each eventually. I know that there are AMT promos, I have one but it's mint and I'm not going to mess with it. I can pay with PayPal immediately as well.

 There are some on eBay, but they are overpriced IMO. Please let me know if you have one (prefer factory sealed but if it's opened but sealed inside, that is fine). Thanks! 

Source: http://cs.scaleautomag.com/SCACS/forums/thread/903826.aspx

Philippe Adams Walt Ader Kurt Adolff Fred Agabashian Kurt Ahrens Jr