Initially people were paying 15-30 and then they had that flood weekend. I sold mine for 8m after 2 days of no recipe drops. It's worth a lot for rogue. It's essentially ....
54 str
38 dex
47 int
With damage.
139 stat points for rogue essentially. Not to mention Proc sends my Crit to around 100% briefly. Not sure about other classes but for rogue, it's very good. Quite op. Anything that comes out that's better will likely be far more pricey than planar pendant recipe.