An update to the sale of the "Blank Bar" Captain America 212 price variant

CGC board member Keldog sent me a note on an additional listed sale of the Captain America 212 "blank bar"  35 cent price variant.  The sale is noted on the Quality Comix site.  I am not sure what is going on but the Quality Comix site lists a sale of the same CGC 6.0 book at $4520.

Interestingly, the book has now shown up on ComicLink with an asking price of $7000.  It certainly begs the question of what is going on with this book?  Anyone know?