Suggested retail prices Blued Finish $ 318.00 Parkerized Finish $ 361.00 Hard Chrome Finish $ 377.00 AFAIK, there is no sn data published for Kel Tec. You could try calling them.
In order to tell how old your Colt 25 semi auto pistol is, you will need to offer the serial number. This number gives you an idea of when the pistol was manufactured.
50-160
A desirable item to an H&R or early semi-auto pistol collector - value will excede $500 at auction.
You probably have a Mk. I pistol, manufactured circa 1958. If this is the case, it would be a semi-auto pistol, chambered in .22 Long Rifle.
Anywhere from $25 to $100.
Need to know what model before an answer can be given. assuming you are refering to a colt 45 semi-auto pistol the date would be about 1914
100-400 or so
50-200 or so
50-500 usd
225
$50
25-65 US dollars