Value of a Colt Gold Cup series 80?

[KimberPB]

I have a friend that's selling a Colt 1911 Gold Cup Series 80 all blued in mint condition with a colt 9mm and .22 conversion kits. Being a 1911 guy I'd love to add a Colt to my collection. So what do you guys think is a good price for this package?

 

[KimberPB]

Oh and it's the Mark IV