Rent vs. Buy?

[fuzzytop]

You have to remember that if everyone keeps buying online, the local dive shops could be put out of business.....and then, where will you get your air?  I don't think you can buy that online. 
When at depth your gear starts to fail, you may wish you had spent the extra couple bucks to have your life supporting gear serviced by someone you can see and talk to, as opposed to a voice on the phone - a voice that may or may not be in this country.