Values vary based on calibre, condition, and year of production. The can sell from less than $100 U.S. up to $500 U.S.
25-160
My grandfather's pistol used in ww1
50-500 usd
made 1917. value depends on condtion
100-800 USD
ask: felix@bedians.com
50-325 usd
$200-$300 depending on condition
50-800 usd
Proofhouse.com has Colt sn data.
Your colt junior 25 auto was produced in 1962.
Go to gunbroker.com and see what everyone else is selling and bidding on it.