Not a very large market on these, so wouldn't recommend marketing these in bulk. There are periodical end users who love accounts like this, and pay good prices for things, but on a general basis won't be able to sell that many.
I have seen a 75 defence pure sell for over $500 before to an end user like this, however on general selling in bulk they'd probably sell for $50.
So if you wait for the right customers, and don't plan to sell a bunch of them, possible $30-$50 to the right person.