Just because those products were in the Sears catalog, it shouldn't be assumed that people in 1975 actually
wanted them.
I DO NOT recall ever seeing any kids wearing those loud plaid outfits. Even back then, Sears wasn't exactly the epitome of fashion.
The Erector set, the toys, the CB radio and the guns most likely sold very well. Also the pre-washed denim. What can I say? Flared pants were the style and everyone wore them. They had been in style for years by 1975. They started going out of style soon afterward, though.
Yeah, corduroy was still moderately popular then, as it had been since the early 60s. The adult clothing shown would have been regarded as OK, but not anything that was particularly dazzling or special. In 1975 the big hot fashion trend was what we now call "disco clothes" but at that point they were still too fresh and trendy for the Sears catalog.
I have no idea how well the other products sold. Something tells me the the Pizza Hut edition Easy-Bake Oven wasn't exactly a chart-buster.
If these things didn't sell, then it indicates that most of us back in 1975 did NOT want them for Christmas.