100-500 or so
100-1000 USD or so
S&W never made a 25 ACP handgun for retail sale.
Your best bet is to get a letter from S&W. Cost is 50 USD.
Go to SMith and Wesson's website and order a letter. It will cost $30 or so. Go to a bookstore and look for the Standard Catalog of Smith and Wesson by Supica and Nahas.
For the S&W, you can request a history letter from S&W. Cost is 50 USD. Can't hekp on the H&R
100-1000 usd
S&W does not make one.
50-600 usd
Still made. Cost in the 1000 USD range.
100-600 usd
600-800 USD or so
100-1000 depending on EXACTLY what you have.