Welcome to PG! You certainly came to the right place to ask questions.
If you are after colorful pearls, then I agree with PearlDreams that 2nd strand in the last set of photos has good color.
A couple of things you do want to look at when viewing, how blemished are the pearls? It's easy to become distracted by noticing the circles (which are quite lovely and add texture) and the color. What about the luster? Can you see the adjacent pearls reflecting? I would also ask her to describe the blemishing...are there 1 or 2 pin pricks on some of the pearls, or are there multiple on each? Are there any areas of missing or uneven nacre? All pearls have natural blemishes, just some are more heavily blemished than others. Blemishing will impact their price, as will size, color and luster.
I would ask Wen for additional photos of the strands you are interested in...sometimes it's tough to see the forest from the trees.