Small EDC fixed blade for under $50

[shot3gun]

Preferably one with a thick spine (3mm-4mm), some usable jimping, non skeletonized handles (so no izula), and especially a finger choil. Something like the Benchmade Activator looks really nice, but it's out of my price range )=

 

[Dagon]

Two knives which are not fully inline with your requirements, but useful enough. No very deep choil, but your finger won't slip on the blade.
Check the:

- Boker Plus Dozier Arkansas Traveler (on the spine it has some filework which could be used as jimping):

- Boker Plus Pocket Bowie, really a nifty compact fb:

 

[Splat]

There's a few Bokers that might do the trick, also Boker Subcom f/b, Ontario/Ranger Shiv knife, to name a few.

 

[krankkall]

Anza knives, Made In USA

Steve