sorry for the bad way I put what I was trying to ask and my wife said it for me the 2 lowers I have and if I purchased a rifle kit put it together and listed it for sale only a couple times a year is what I meant to ask about because I get lowers from friends and family members all the time because they know I like guns so with that being said that is what I meant to ask about maybe doing that about 3 or 4 times a year
It's not a good idea.
But it's up to you.
I doubt you would even break even though. As others have said AR's are cheap now for factory built ones. Home made ones aren't very desirable.