What is the UPC code to my upgraded Macbook?

Hi,

I was thinking of selling my Macbook on Ebay and when I looked into listing it Ebay require a UPC/EAN code for the listing to be created.

Most products have these excepts Apple's upgraded spec items.

Im have the Macbook 12 inch Z0RN00034 which is the Space Grey, 1.3GHz, 8GB, 512GB version.

Could anyone tell me what the actual UPC code is for these items or if it even exists in the usual UPC code format?

Thanks