Sofar this year, I'm at over 600 in fish and 500 in corals bought online. And I have much more to buy. This is not of course counting equipment and dry goods I have purchased online, which come to around 3k.
My time is at a premium, I really don't have time to run all over the metro area to LFS's and checkout their selections. And then get mad when they don't have what I want or it is highly priced compared to what I can find online.
Some online vendors are very good and others are very poor. You really need to listen to opinions and reviews of the vendor you intend to make a purchase from and communicate with them before a purchase if you have any questions. You can *always* ask for pictures
I guess it's a sign of the times, but those larger establishments who are right next to the airports and who do volume business, seem to be the ones really succeeding in the trade as far as making a profit and everyone pays less jmho