I take this personally to be honest and I would like a moment for rebuttal. I'm not in any way insinuating you're referring to me but coincidentally I do happen to have a five frag pack up for sale at almost the same price you mentioned, $375. So, because I'm selling a pack at this price I'm not a nice guy?! I think there's many people out there who would disagree. I do give away, add in extras etc etc. There's many many people out there who have nice corals in their tank because of my generosity. The colonies I have cut from I grew out from frags like I'm selling. The same frags I'm selling for $375, I paid north of $600. One of those pieces I paid $275 for it. I'm selling my pieces for close to half of what I paid a year ago not to mention the money and sweat equity I've put into it to get them to where I can sell them to recoup some money back to buy more nice pieces to again sell at almost half of what I paid for it most likely. Wow, I guess I really am a schmuck. So, to answer your question, that's how I personally "get away with it".
Nothing has happened, the price of corals has gone up as the prices to get them here, equipment and supplies to maintain them including salt have gone up and that's how things go. You have choices, make the ones that are best for you and your budget but don't disrespect the ones that don't coincide with your choices. Peace