Cost, caliber and maker.
No
No
No
no
$250-$350
The Walther P88 and P99 models are no longer manufactured but you can get newer models like the P22 and P45
Why not ask Walther instead of us? Waltheramerica.com
No
Some people use a Walther P22 for shooting practice purposes, some use just for a day at the shooting range. The Walther P22 is known for being fun to shoot and no recoil. Some use as a gun to protect their family.
Earl's Repair Service, Walther's USA site.
Walther uses a date code of two letters.
Stick with the factory offering.