Everyone encounters different items in any hobby or line of work. Wide-ranging experts (Tam) are few and far between.
Sometimes even they have to stop and ponder. That's when it's better to be lucky than smart:
Over at Say Uncle, Unk's linked to a mystery gun. Tam was having one of those it's-right-on-the-tip-of-my-tongue moments, identifying the design antecedents of the gun; I took one look and muttered, "It's a Star, Model F, I have one a lot like it..."
Quick trip to the safe and I've actually got two; one's an FR, (which I suspect is the "mystery" model) and the other, older, is a plain F. Very nice little .22 target pistols from a decent Spanish gunmaker.
Interestingly, while the artwork on the box shows the FR's bell-shaped barrel housing, it omits the slide stop notch.
I'm not sure about Blue Book on these but I paid just over $100 for each.
PS: The Beeb's article seems to imply the gun in their picture is a Kel-Tec. Sloppy, sloppy. It's called Google, Auntie. It's called Wikipedia. Give them a go!
PPS: Commenter-d00d, they are not toys. Kinda cute, true.