User blog:Joshnacho/logo

Hey collectors and fans, I have recently been digging my old comic books out of storage to see what they may be worth and found that my copy of the uncanny xmen vol 1 #300 foil cover does not display the 30 year xmen logo stamp in the lower left of the foil cover but a UPC bar code in its place with the numeral sequence 071486024613-05. Does anyone have a simular copy and if so what does it mean? Is it a misprint and worth more or is it a common print? Any thoughts would be greatly appreciated. Please e-mail me at joshnacho@hotmail.com thank you