considering the drivers cost around $225 each new, not that bad really...
i have a bnib set that i paid $500 shipped for. which i feel is reasonable considering that is about on par with what they originally cost. They are discontinued. And there aren't many drivers that can compete with them in that price range imo.
i have 2 sets that are in mint condition with very little use on them if anyone is still looking for a set. but based off what i've seen them going for lately, they won't be cheap.
i also have a set bnib but will not be selling those.