That depends entirely on your state and local laws. If you live in New York City or Washington D.C., the answer is "you can't legally purchase a handgun".
If you live in a locality where it is legal, check the phone book for sporting goods stores or gun shops and go shopping. If the local shops don't have what you want, go to auctionarms.com or gunbroker.com and a purchase can be arranged through a federal firearms licensed dealer near you.
Note: the Lady Smith model 60 in .357 is rather stout when firing full power loads. Practicing with .38 Specials is considered wise.
You can get them online from the Monster website: http://www.monsterheadphones.cc/lady-gaga-headphones.html Best Buy (They are less expensive at Best Buy then online directly from Monster) Amazon.com
I saw some at Lady Foot Locker.
buy applause on itunes
Because people buy her music.
You can
You don't have enough money to buy mine.
www.gunpartscorp.com might have some.
That sn could be for a Model 13. It could also be a sn for two or three other models. You will have to call S&W to find out unless you have the weapon. Buy 3rd edition of Standard Catalog of Smith & Wesson, written by Jim Supica and Richard Nahas. These guns were made for Police and Military use According to the book, your model was made in 1981. Model number is stamped on gun near the cylinder towards the front.
Try CDNN, Samco, SOG, etc.
You buy a book that has the serial numbers in it.
from the shelves
gun shop, gun show, pawn shop, for sale ad.
I would start my search at Smith and Wesson first.
Ebay / Amazon
Buy a reloading manual.
It all depends on the person that wants to buy it, the model (there are over half a dozen Beretta Stampede models), the the condition of the barrel and the weapon parts, the accessories that have been added to it and need of funds by the person selling it.
try www.gunparts.com or a gun smith could make you one