[Ronnie73]

I also forgot to mention that i'm less likely to agree a color is missing if the card back has major damage. Certain glues can change colors or fade them over time. I would never purchase a missing color card with major back damage but thats just me being cautious. I'm sure there are some with damage that are legit.

One thing that can be done is to try and find the same card where the red printing is just a little off center so you can see the exact color that should be under the red color pass. If you see the orange color that your cards are, then you know its missing the red pass. I did that with my Red Kleinow Batting card just to confirm the hat started with yellow first. Some can be found where theres a little yellow showing on the visor when the red is a little off registration.