[Cdnone1]

I have been following most of the different gun, ammo, reloading etc. threads for years now.
I would like to buy my first handgun. I really just want to have one in the house for protection. I have two teenage sons that I plan to take gun safety courses with and teach them respect of firearms.
The gun will remain locked at all times with the ammo locked in a seperate place in the house because I'm not to worried about break ins as I am other type of security.

I would like to buy a semi auto handgun.
My questions are
1- What type of gun can I buy for around $500. I don't mind buying used as that's how I've bought all my Porsche's.
2-Do I have to really worry about all the stuff I read here about ammo? Can I just buy ammo off the shelf and get decent results from it?
3- How do you "sight in" a hand gun or do I need to do this at all if I'm not to worried about distances over 30 yards

Any advice would be appreciated
Thanks
Steve