I started a wee collection of gold Q9 20/10 Plagueborn staves, after noticing my alt account Rit was carrying one in Spawning that dropped for me much earlier. I've since picked up a Water one for 45K.
With the rage in OS staves being 20/20, the 20/10 are just not getting the love. But when the primary attribute is not often cast, like in ES or Spawn, the 20/10 staff makes a lot more sense than a 20/20.
I'll keep collecting them and see how many I can find for a reasonable price.