I just bought a used Colt MK IV series 80 "Officers" model in .45 ACP .
For a 25 year old gun is in great shape.
It has wooden grips and someone added a ambi safety (which I need) to it.
We took it completely apart in the store & wiped it down (it was already cleaned) and lubed the slide & rails.
I bought it for $510.
Here are the details of the gun.
My new Colt Officers Model 1911 in .45 Cal.was made in 1985.
The finish is a Satin Nickel finish
It has Millett Series 100 Custom Combat Low-Profile Sights installed.
It has a Videcki Custom Trigger installed - it's a 3 hole trigger w/ over travel screw.
Ambidextrous safety by Armand D. Swenson, (Fallbrock, CA, US). .. the safety's finish is either chrome or shiny Nickel.
I took it to the range and put a quick 100 rounds through it.
It shot great.