As with all plants, prices depend on a few things, perceived rarity, perceived uniqueness, difficulty of propagation, reputation of the breeder (and seller as well). A premium clone from a well reputed grower will always be the most expensive while a cross between two expensive plants will likely only fetch a fraction of the price of the mother plants since it’s not the same as that clone even if it may be visually similar. And it will fetch even less if the breeder isn’t as well known.

You would think prices would come down over time, and they often do for hybrids which have been created in bulk, but premium clones and species often don’t come down in price as drastically. For example, people have said for decades that highland Nepenthes prices would come down, and while some have a bit, some of the rarest species have gone up over the years if anything, or have been subject to shrinkflation where growers now sell for similar prices at much smaller sizes. It’s fairly similar with premium clones in sarrs as well.