I always price stuff materials plus labor. You can always pick cheaper materials. I will also consider who is asking - friend, family, relative, co-worker....I also enjoy doing this stuff, so if I can put something together for someone else, I get a "fix" and win w/out spending any of my own money. Then I make a few extra bucks to fund my next "fix"
Wow, that sounds like I'm some drug addict!!
LOL!!