The Walther P88 and P99 models are no longer manufactured but you can get newer models like the P22 and P45
P what? P38, PP, PPK. Could be worth 100 dollars or could be worth 10000 dollars depending on EXACTLY what it is and condition.
No
100-1000 USD or so
No way to know.
walther Fleming stated that all living cells come only from other living cells. he stated this in 1879