Fuck selling cocaine. lol. Like Writer said the risk is wayyyy higher. Selling cocaine is one of the most stressful "jobs" I can think of. Especially, if you're really trying to make a buck. Once you get above buying/selling to users, guns get involved. Hell even with selling to users, if it's the wrong people you have to worry about that shit. If they had been caught with like 20,000 hits. I'd be inclined to think they were getting it directly from the producer. 900 is small time in the greater scheme of things. Sure if you or I had 900 hits, it'd probably seem like a lot, but most of us aren't out trying to sell it.
900 hits is only one full sheet. Plus 900 doses is only about a tenth of a gram of crystal. For example this is 900 doses; each picture is 100 as are a lot of sheets; http://blotterart.com/
Those mo fuckas! haha LSD has a huge market and alot of money. Its also alot easier to deal with people that deal it because most of them are older people or are pretty chill. Not like coke and meth dealers.