Well you need to make sure they have no genetic deformities, and get them out of the woods do to speak, they are still very fragile and giving them to first time owners etc would be a lot to ask for - they still need alot of care!
6 weeks is about normal, but i would vet the new owners, make sure their tanks etc are up to standard, make sure they know what to do, offer some after care etc.
As for price, it depends, you will need to get something back to cover at least the feeder costs, but it depends on what the 'beardie' market is like near you, for instance, is there another breeder nearby you see as 'compition' or a store that sells them. I bought Gizmo as a 7 week hatching for £50 for instance, but got lots of advice and after care from the family run shop i bought her from.