People keep getting this confused.

On January 27, 1963, Oswald ordered a Smith & Wesson "Victory" Model .38 special revolver from Seaport Traders of Los Angeles, for $29.95 plus postage and handling.

On March 12, 1963, Oswald ordered the 6.5 Carcano carbine by mail from Klein's Sporting Goods in Chicago from an advertisement in the February 1963 American Rifleman. He paid $19.95 plus postage and handling by money order. His order included the rifle ($12.78), a new 4x telescopic sight ($7.17) that was mounted as part of the package deal.

So he shot a police officer with a $30 S&W Victory Model in .38 Special, and shot Kennedy with a $20 rifle and scope.

Oswald's revolver was a .38/200 Lend Lease revolver, serial number V510210, converted to .38S&W Special with the barrel shortened to 2". A new S&W revolver at the time would have cost about $65.