If you are looking for the Firefly pistol, check this out. I have heard rumors that the molds have been retired, so no more will be made of these (don't know how accurate that rumor is). This is a sweet deal for one of these pistols... but not only are you getting the pistol, you also get various paper props.
Check out the auction if you are interested in a sweet deal and have a Browncoat in you!
http://cgi.ebay.com/Firefly-Serenity-Prop-Mals-Gun-finished-Maps-Money_W0QQitemZ270068433838QQihZ017QQcategoryZ18839QQssPageNameZWDVWQQrdZ1QQcmdZViewItem