I have had good luck with Coast Knives. I originally started looking at the line for my 12 yr old boy scout, so I would get less upset when he lost them. I kept one to play with, and gave one to him.
I have carried it for the last 3 months with relatively few issues.

I picked up a blister pack with 2 LX236 for ~14.00, or 7.00 each.

lock back, hole in handle like spyderco 1/2 serrated.
Pocket clip.

Currently a similar model is at Home Depot (BX111) for 8.49.

It is no benchmade, or even a spyderco (ok, maybe a spyderco Byrd), but not too shabby. Clip caught on couch and bent, had to unscrew from knife to fix it, took 5 minutes.
It did NOT like cutting carpet, edge badly dulled in 2 strokes, but less than 2 minutes with a DMT had it cutting hair again.