Just received this today. It was described as "Never Hinged, last two items unused"

Rolling the dice on the fact that the image was posted upside-down, I paid $33 for the lot ... more than fair for the two, never-hinged souvenir sheets (cat $45/ea in Scott). As it turns out, I was correct. The "Bottom two stamps", which are upside-down in this picture (Scott 665-666 $90/pair; Mi-111, 112 €105/pair), are perfect, never hinged stamps with top margin selvedge.
The "Unused" (no-gum) stamps are the two cinderellas which I haven't a clue about.
Sometimes it pays to look at things from a different angle!
Brian