Price range is $500 max...not much, but it does include used guns.
Kinda putting the cuff's on with that price range but alot to be had out there for that or less.
I just think that limiting yourself to a certin price range ($500.00) will more times than not end up in an unwanted hand gun and ultimately result in a loss of money and eventually lead up to what you should have gotten in the first place.
A gun without the limits but still being conservetive in your choice, a few hundred more than your $500.00 limit will open the door wide open as to your choices.
Remember you get what you pay for and it is tough to find an exact fit without being open to spending a little more. I would say continue to save another $200.00 - $300.00 and get what you really want and that fit's your need's to defend yourself with.
Used gun's are a good choice and I have bought my fair share of used gun's, but remember they are used for a reason, could be that the gun does not function properly and the owner passed it on, or it isn't what the original owner really wanted in the first place(hin't, hin't) or they could have trade it in to upgrade to what they really wanted ultimatetely loosing money on the deal.
Glock is a good choice for that price range and truthfully you can't go wrong with one but I don't think a Glock makes for a good pocket pistol. A Kahr PM9/40 would make a great pocket pistol though IMO.
Just some thought's,