Here is my 52 Mantle that I rarely (if ever) have shown. I purchased at the 2019 National. I walked the whole floor and I only found one more PSA 6 at a table. Plenty of PSA 1 & 2. A few 3's but after that, it was slim pickings. The color was not a bright on the other PSA 6. It had softer corners than this one. They were asking 80K. I paid much more for this copy and I would prefer to keep that amount to myself (respectively). I will say that it was under 100K however. Since 2021, there hasn't been one that has sold for under 100K - regardless of how bad the color or centering is. Also, PSA 6's don't often show up for sale and the ones that do aren't attractive to the eye. Heritage recently sold a hideous PSA 5 for $105K. I personally would value this 6 between $170K-$200K.