Clipping them so young is going to bring a lot of problems in their lives; it's something that's not suggested anymore by anyone because if they don't learn to fly properly, in the first few months of their lives, it will be seriously detrimental.
Unfortunately when they are so young they are full of energy, I feel for you because I remember how exhausted I was every night after they were all asleep... It's the worst part for someone who's no spring chicken like me, tying to keep up and convince them to listen.
Have you tried to take one baby to a room on his own and then interact? Without all the distractions they are usually calmer.
About selling them, a while ago Hannah posted a similar question and got a few good answers
http://www.littlefeatheredbuddies.com/forum/viewtopic.php?f=23&t=1628If you don't care too much what happens to them it won't be too difficult to sell them, I personally suggest high price and ferocious screening to avoid breeders, brokers, hoarders and other bad individuals.
I asked a high price but the ad was written in a way it attracted all the right people and they went very fast, all of them.
They were not particularly tame either... I had to chase them all around the house when it was time to put them in the new owners' carriers... and they still bought them
