I see very young bettas for sale on Aquabid(I'll try to find the auction again, but i think it ended the other day. Maybe they will relist, as no one had bid on them). They are marked as unsexed....but i will see something like: Unsexed Mustard Gas juveniles.

Then i go to see the picture and these are brown colored fish with clear fins....how do you know what you are bidding on is really mustard gas if you can't see the colors yet??

Or i'll see: Young, steel blue females. Go to see pic's and again, brown fish with clear fins.

So, how do you know they are actually going to be that color? Am i missing something???

How you know is by the raputation of the seller from her or his feedback. The more the better with no negative feedback or complaint by buyers. Check in the forums too and people do complaint there sometimes if you are an aquabidcholic. :) Ask questions to the saller too and also inquire to see the real parent pictures. Asked them what generation are they too. :)