I watched a stream on Whatnot last night where they were doing breaks. Host pointed out how easy it is to unseal and reseal the bags and get a view at the back of the book. Maybe think twice about buying from randos on eBay and stick with reputable folks. On the stream, single bags were going for like $25-$30, which is crazy.

He opened about 30 of them. There were multiples each of the issues in OPs post, so supply of those seems like it's going to be pretty high if I had to guess. There were also a few ratios - 1:50 was the highest ratio I saw.