I tried not to read ahead (much). I'm with Tink and Cheryl. A "set" is related items. The first link most certainly is a set, in two related colors. I think adding the eight transparent spacers is a nice touch, it gives you something more to work from than just opaque red and turquoise. I'd be looking for something like that anyway.
The second link shows me 7 nearly identical beads. A group of the same thing, which can also be a set.
The third link was presented as three sets possibly blending into one larger set (the inclusion of the green bothers me, but that's MY own personal taste).
They're each different kinds of sets. The first has a distinct focal, the second doesn't, the third doesn't either but offers different directions to take the sub-sets. It's all about possibilities. You might not find the set to be related enough, but others may. As Cheryl said, it's the artists' vision and pretty darned subjective. I've had customers tell me that it wasn't the focal that grabbed them, but the accents I included...on the same set that someone else wondered why I added them at all! LOL I've seen sets (and put some together myself) where the accents weren't the same color at all, but complementary colors, like cobalt blue and lime green or yellow and gold, etc. I suspect that the artist for the first link felt that even though the spacers in question are transparent colors, they're still red and aqua/turquoise so it felt right to her.
Pricing: Another subjective issue. (Oh if only there were some hard and fast rules!) The first link has some very large and intricate beads. I agree about the price of spacers but even subtracting them, that's only $7 per bead for the remaining 7, quite a bargain for the size and complexity of the beads. Those dotted cubes aren't the easiest to do, either...add them in and the price per bead drops to $5.45. Michael's beads are on the smaller side (of my personal scale) but he's only asking for $3.50 per bead, for reasonably complex, well-shaped beads. Kim's set has 12 spacers. Subtract those and she only asked for $2.40 per bead for her starting price. The set is also on the small side but even the spacers have white hearts and were etched, which takes additional time.
In the end, I think "set" is subjective, and most of those beautiful beads are terribly underpriced. But that's another soapbox for another day.
-- KarenK Desert Dreamer Designs
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