Thru various searches I've found several references to improving the trigger on a Crosman 1377 pistol: Lighter spring, super-sear, two stage mod, etc.
For the money, what's the most bang for my buck? I don't intend on formal competition with this pistol. I'd just like to improve the trigger somewhat.
IIRC the one I put in mine was less than $1.
Additionally you might want to experiment with reduced trigger engagement. You could superglue a piece of rather soft metal to the sear (to space the sear down from the tube) and then file it down as necessary to get a safe amount of engagement.
And of course polishing all engagement surfaces, including the hammer face.