Great to see all these thoughtful and really helpful responses. Kitty pricing never does seem to get easier (at least for me) because it changes so much.
And it's also true, what Tad said about the cats you see with prices on them not yet having been sold. That doesn't mean they're overpriced though -- they may just not have been seen much, yet. Most of us do our best to give a fair valuation that reflects how eager we are to get the kitten a new home. But the difficulty of shopping (the rezzing time, the crashing time) also reduces the odds of "Cat X" being located by "Shopper-Searching-for-Cat-X", even if "Cat X" is exactly the right price.
So I really agree with what Jwenting said about ... being willing to buy the 11th cat for 500L knowing that perhaps somewhere, in the vastness, there might be 10 similar ones priced at 300L -- it could take hours to find them, and then you'd risk forgetting where the 11th cat was if that turned out to be your choice.
You just find out some of them were either correctly-priced or under-priced if they vanish too quickly. The big pink cat for 8K at least maybe will still be available when its competitor, the 4k big pink cat, is long gone

Big cats do seem to sell quickly once the price reaches a "reasonable" level -- probably because they are big and billboard-like, and people see them. People don't see the teacups as well ...
What Ivy said in the second post on this thread -- well said, and it's pretty much what I try to tell people who ask how to price kitties -- and everyone's added observations are really helpful here.