Thank you both for your suggestions. I am forum illerate (I think I spelled that wrong)

Where on the forum would I ask who's selling. Is that permitted on this forum? Don't want to do anything wrong.
I'm a very small hobby breeder. (I may not use the right color lingo but here goes). What do I have not breeding:
males: I'm told FF Silver/pied, fawn/OB.
females: a lite grey (lighter than the regular grey), FF Silver/OB
I have several of each above.
Mostly I was given my finches from a woman who needed to downsize and I told her I loved her birds. I always thought zebras were just grey. That's the only color I know and don't have.
What colors do you think I should add to my very little flock. I am taking it very slow since I'm new at this and want to do right by my babies. I just love finches.
At one time I wanted to get Gouldians but can't find anyone to help me sex them and I'm told they are not as hardy as zebras. Yet, I read this board and you Gouldian owners seem to be doing just fine.
Anyway I'm ranting. I need to get more finches of different colors. I have an aviary to house quite a few so suggestions and what to breed to what will be very much appreciated. Thanks to you all for being so patient with a newbie.