Asura wise, I've seen some of these merc-blahs go for 10-15M.
Sure floor 100 is 100% plat KI, and the good ol chairguy drops some alex and possibly the piece you want in the pool, and people doing stand to gain a lot, but I've never seen anything below the 10M
While I know res wouldn't be a leech or liability, Nyzul relies on a fair amount of teamwork, communication, competent players, and well...luck on floors. Most static groups that have it down well are going to charge in that price range, since an 'extra' is usually seen as a liability or wasted tag b/c nobody wins nyzul 100% and may take multiple tags to get the win with an unknown party. Of course if you stumble on a group that is adept at that magic lamp bottage/floor mappage stuff, they may not care, just show them the gil. lol
good luck!