I have a buddy wanting to off load three revolvers. A 4" 22 CTG, a 4" .357 CTG, and a 6" .357 CTG. All are in good shape. The later two are marked "Highway Patrolman"

Serial numbers found on the butts:

.22 - K 293XXX
4" - N530XXX
6" - S201XXX

Can you guys help me out? I want to offer him fair price.

Welcome! The two .357s are model 28s, which should be stamped as noted in this post:

To IDENTIFY your Gun >

The other one is a .22 Combat Masterpiece, later called the model 18.

"Good shape" is fairly subjective. The two model 28s could be worth between $350 and $600, and the .22 between $400 and $750. More details about their condition or photos will allow more specific value estimates.

Hope this is helpful.

__________________
Alan
SWCA LM 2023, SWHF 220