Single bullets are not sold at gun shops. Collector's will sell single examples and prices can range from less than a dollar to multiple hundreds of USD
I bought one at auction for $150
Depending on who made it and its condition; 100-1000 USD
Shooting .38 Special ammunition in a .357 revolver offers advantages such as reduced recoil, lower cost, and versatility in ammunition options.
20-60
38 special is only a revolver caliber. that's like saying a 44 magnum revolver or a 500 special revolver. a revolver is a revolver
10-1000 USD depending on specifics.
25-50 USD or so
40 or so
It depends on what you mean. A .38 revolver may be a .38 special, but there are other types of .38 besides just the special round.
50-500 usd
50-500 usd
Yes, you can shoot .38 caliber ammunition in a .357 revolver because the .357 revolver is designed to also shoot .38 caliber ammunition.