I think what Alto is saying is that if he buys one of those "mixed frag bags" where they give you X amount of corals for X dollars, you never know exactly what you are going to get. Alto is looking for specific colors.
I have ordered several mixed frag bags from several different sites it the past. I can say, that every time except for once, I was totally disappointed. Every zoa frag bag that I have ever gotten has been filled with brown zoas. And MAYBE, just MAYBE one frag of orange or red zoas. Still nothing special.
The only frag bag I have ever been 100% satisfied with was a ricordea frag bag I got from
www.gatewayaquatics.com. They have a package where you can get 10 for $100, 22 for $200, or 34 for $300 (or something like that). I ordered the $100 package, and EVERY SINGLE ricordea polyp in the bag was a different color combination. No duplicates. Not 9 green ricordeas and one blue one. 10 totally different ricordeas.
I have ordered mixed zoa, LPS, SPS and ricordea bags from
www.reefermadness.us also. Out of the 30 pieces of SPS I got, only a few of them were not brown acros. Out of the 10 "ricordeas" they sent, only ONE was actually a true ricordea florida or yuma. The other NINE were frilly mushrooms or rhodactis mushrooms or just regular old mushrooms, but they advertised the package as a pure ricordea bag. And charged $10 a polyp, of course.
So I totally see what Alto is saying. He is looking for specific colors, and in that case your best bet is to only buy specific frags that you have seen pictures of.