Meh, I did what reefhound did and shopped around online pretty extensively before deciding to use the Pennekamp outfitter. Pennekamp charges $60 for a 2-tank trip, pretty much everyone else in Key Largo charges $80-85 for the same thing. Or at least what *appears* to be same thing. I looked at most of those same websites, did not see the Blue Water Diver or Conch Republic sites unfortunately. If I had, I might have figured out why Pennekamp is $60. The other websites tell you what you get or don't get for your rate.
Okay, I messed about the Pennekamp website and pinned down their rates better. They DO they list "tanks and weights only-$17" beneath the gear rental and trip rate. "SCUBA trip" is listed as $60. "SCUBA trip" does not unfortunately provide any details as to what is/is not provided. I consider this either deliberately misleading, or lazy.
I will consider myself schooled. All *that* said, it would be VERY NICE if the Pennekamp operator used the same rates description format that everyone else I've ever dived with in the U.S. or Caribbean does (and apparently the other Key Largo operators as well). When you list your dive trip rate, you either do it like this:
Dive Trip (includes tanks & weights)
or this
Dive Trip (bring your own tanks)