There have been bid name stores selling factory built, name brand ARs for less than $400 lately. I don't think you could compete with those prices. Especially with all the licensing and insurance required.
I picked up my new Velocity deep concealment holster yesterday and couldn't be happier! I ordered it and Justin contacted me ONE day later to let me know it was ready! Great turn around time plus, it was considerably less expensive than comparable holsters. I will be ordering more from him...