It is astonishing how quickly, during the Pandemic, Instagram live BIN sales flouished. Some IG sellers are knowledgeable, reputable sellers where you can buy with confidence on the advertised grade (Superworld and Silver Age Comics come to mind), but many others don't know how to grade or intentionally grade vaguely ("this is a nice mid-grade book, somewhere, I'd say, in the 5.5 to 7.0 range") -- not that it matters because buyers continue to throw money on the book (particularly $50 to $350 books) without a showing, ever, of the back cover or any look at the interior.