gun tracking/traceing for age

[stilllearnin]

Anyone know a good place or way to find the exact age and worth of handguns?

I just bought a few new handguns and I want to see exactly how old they are and what they're worth so I can list them on my insurance.

If it makes a difference they're:

357 Rossi - think it's from the 20's but not sure if they had flash supressors then or not.

38 special RG/rohm - this thing has me confused! one side of the barrel appears to say Brazil but the other says germany ,then above the trigger it says los angelas cal.

(top two are revolvers)

9mm Ruger - I belive it's a 1917 but not 100% sure
(semi-automatic)


I really like the 357 so I'm trying to find out the most about it

[img]http://www.cichlidfish.com/webusers/web_pages/stilllearnin/junktemp/357.bmp[/img]
not a great pic,had to use the webcam (i'll update it tommorow)