[Fizban]

These are pretty good. The Lighstep crystal is waaay to cheap, and the alignment crystals should only work against the opposing alignment and be more expensive, like Glimbur said. I think the steadfast crystal is probably a bit too cheap as well, since DR 3/something usually costs more than that to begin with. I really like the crystals of expertise though, that's the kind of ability they've been charging way too much for, and for only the one weapon. Letting you transfer it between weapons actually makes it worth it, and the opportunity cost of not having a different crystal should balance it out quite nicely. I can't comment on the Dragonmark Crystals, all I know is that there are similar items in the Eberron books, which may or may not be cost effective, and that's basically what you'd need to compare to.