Back in the 70s I couldn't afford colour, and to be honest, there was not a lot that appealed to me. They seemed to be mostly digests from Columbia. The only colour film I bought was the L&H Tree in a Test tube, which still looks the same as when I got it.
I'm wondering if I am the only person who can tolerate red prints. I prefer to watch without the aid of filters. I've said this in private, but never in a forum that I recall. I think the problem we have with red prints is when we get out a film that was perfect when it was new, then discover it's turned completely red. We think of the film as lost, it doesn't exist anymore. Years ago I was given a 400ft digest of Lawrence of Arabia, and the colour was perfect. I watched it twice and put it away. One day I thought I would like to view it again, got it out, found it was totally red, and put it back in the box, where it has stayed since.
I don't seem to have that problem with prints that already red; maybe it's because I never owned them when they were perfect. Strange as it may seem to some, I acquired two of these from Ebay in the US, so had extra postage and import tax to pay. But I love these two films and have watched them several times.
I'm not in favour of dumping prints; what doesn't appeal to one, may appeal to someone else. You also have to remember when buying 16mm that maybe some of these titles didn't appear on IB Tech or low fade stock, so it can be a case of that or nothing. I do have copies of some of these films on DVD, so I can watch it perfect if I want to, but I get a lot of pleasure from firing up the projector.