I would never have thought this had I not spent seven years doing it, so bear with me... But assembling a high-grade (MINT-GEM MT) 1975 Mini Set was one of the most challenging experiences of my collecting life. A wall is eventually hit. Those cards are plagued from the factory with massive OC and print issues. Entire color combos (red/yellow & green/yellow) are almost always found too short and riddled with print defects. And then the epidemic of tilt, which is so detectable to the eye, thanks to the design of the cards.
Some of those commons were pricey and rare just in 8-grade, with lower pop PSA 9 commons routinely hitting low four-digits. In terms of 70s sets, I'd put it right beside the black beauties.
Glad I emerged unscathed and lived to tell the tale
