Space Search is still 12.79.
Ones that were 5 bucksish - the Dune books, the Rediscovery of Man, Norstrilia and he Instrumentality of Mankind by Cordwainer Smith, but not the Quest of Three Worlds, which is 8.46.
Babel-17 by Delany, Synners by Cadigan, Eon by Greg Bear. When Gravity Fails by George Alec Effinger (but not Budayeen Nights, didn't look for others yet).
So guess will check in a few days more.