First, the outside of the house looks like the one Macaulay “Kevin McCallister” Culin lived in, a quiet suburban neighborhood, where anything could happen behind clised doors.
Second most people try to keep this stuff hidden. At garage sales, I’ve rarely seen porn of some kind. Once I bought a VHS cooy of “Emmanuelle” at a garage sale, the seller with white hsir keaving me windering if it was left from her younger days, or maybe it was her husband’s and she was glad to get rid of “that horrible thing”. It was s commercial copy, but badly chopped, just as it got to the good parts, it would jumped to the next scene. Another time, two women had a lot of sex DVDs, but a closer look suggested they were educational, though I realize there can be a fine line there.
I suspect people are generally unwilling to be connected with such things, embarrassment or fear of attracting unwanted attention.
So maybe this guy is hardcore, and thus willing to flaunt it, or maybe it is staged, as someone said, for the rental purposes.